The first number sets the scale
Anchor pricing is the practice of putting a number in front of you so that the next number is judged against it. The crossed-out figure beside a discount is the obvious form, and it is the least interesting one.
The effect is robust and well documented. Show someone a jacket at $89 and they judge it against their sense of what jackets cost. Show the same jacket at $89 with $220 struck through, and they judge it against $220. The jacket has not changed. The scale has, and with it the feeling of whether $89 is a lot.
That is why a stale reference price is worth something to a retailer even when everyone knows it is stale, and it is the mechanism underneath most of the pricing questions in this cluster. The pillar it belongs to is is this a good deal.
Knowing about it does not switch it off
This is the part that surprises people, and it is the reason the defence has to be procedural.
The effect persists in participants who have it explained to them beforehand, in participants told the anchor is random, and in professionals valuing things in their own field. It is not a failure of attention or of scepticism. It is closer to a property of how comparison works: with no absolute sense of what something should cost, the mind uses whatever reference is available, and the available one is whatever was shown first.
Two consequences follow.
Distrusting the crossed-out number does not remove its effect. You can know a reference is meaningless and still feel that $89 is a bargain beside $220.
And the effect is strongest exactly where it matters most: in unfamiliar categories, where you have no independent sense of the price. A shopper who buys headphones often is harder to anchor on headphones than someone buying their first pair, and the first-time buyer is the one making the larger relative decision.
Where it appears beyond the crossed-out price
Recognising the other forms is worth more than recognising the obvious one, because the obvious one is at least visible.
Tiered pricing. Three options where nobody is expected to buy the most expensive. Its job is to make the middle one look moderate, and it does that whether or not anyone ever buys it.
Pack sizes. A large pack priced to make the medium one look sensible, which is why the medium is frequently the one on the shelf at eye level.
Order of presentation. The first result in a sorted list anchors the ones below it. A list sorted high to low and the same list sorted low to high produce different judgements about the same products.
The opening number in any negotiation, including a quoted delivery estimate or a starting bid.
Recommended add-ons. An accessory at $40 feels small beside a $900 purchase and large beside a $60 one, which is why the same accessory is offered at the same price in both contexts.
None of these requires anyone to state a falsehood, which is what makes them durable. They are choices about what to show and in what order.
Why an inflated reference survives regulation
Rules in several countries now require an advertised reference price to be one actually charged within a recent window. That is a real improvement and it changes the timeline more than the practice.
Where such a rule applies, holding the higher price for the required period and then discounting from it is compliant. The reference becomes genuine and remains uninformative, because a price held for four weeks to satisfy a rule is not the price the product normally sells at.
Which is the general shape of the problem: the reference can be truthful and still be the wrong comparison. That is why the check has to be about what the number is compared against rather than about whether anybody lied, and the three forms this takes are set out in how fake discounts work.
Why sellers reach for it rather than for a lower price
The commercial logic is worth understanding, because it explains why the practice is so durable.
A reference price costs nothing. Lowering an actual price costs margin on every unit sold. If a crossed-out figure produces a similar lift in conversion to a genuine reduction, it is strictly better for the seller, and the evidence that it does is the reason the technique has survived every wave of scrutiny aimed at it.
There is a second, quieter reason. An anchor also protects against comparison. A shopper who has been given a scale is less likely to go and build one, and the few minutes not spent checking another retailer are worth more to a seller than the discount would have been.
None of that makes the individual retailer unusual. It makes the technique the default, which is why the assumption worth carrying is that a reference number exists to frame rather than to inform, and the burden is on it to prove otherwise.
The defence that works
Since scepticism does not help, the answer is to supply your own anchor before the page supplies one.
Decide what you would pay before opening the listing. Even a rough figure. Having a number in mind means the page's number has something to be measured against rather than the other way round.
Or look at the price history first. Better, because it is a real number rather than a guess. The range over the last year and the band the price usually sits in give you a scale built from what the product actually costs, and after that the crossed-out figure has nothing left to do.
Convert to a comparable unit before judging. Per item, per litre, per use. A unit price is harder to anchor because it forces a second calculation, and the second calculation is where the framing loses its grip.
The common thread is that all three replace a feeling with a number. Anchoring operates on the feeling, so the way past it is not to feel differently but to have an alternative figure available at the moment of comparison.
And the three numbers most often confused in this territory, the suggested price, the retailer's list price and what the thing actually sells for, are worth keeping separate, because the anchor is almost always one of the first two. That distinction is MSRP against street price.
A last point worth holding onto. Anchoring is not a trick played on the gullible; it is how comparison works when there is nothing absolute to compare against. The people least affected are not the most sceptical, they are the ones who already knew what the thing cost. Which is the whole argument for looking at a price history before looking at a price: it is not about resisting a feeling, it is about arriving with a number.
That also explains why the effect fades with familiarity. Buy the same category often enough and the reference stops doing anything, because you have your own. For everything you buy rarely, and that is most of what anyone buys, the history is the substitute for that familiarity.
The one-line version: the first number you see is doing work, whatever it claims to be, and the only reliable counter is to arrive with a number of your own.
It is also the reason a list sorted by discount percentage is close to useless. Sorting by the size of the anchor's effect surfaces the listings with the largest references rather than the lowest prices, which is exactly backwards from what a shopper wants.
