Start with the reassuring part, because it is the larger one. Almost every seller on this roster publishes one figure per product and sticks to it. Internal contradiction is rare here — rarer than the four-week billing cycles or the promotional rates counted elsewhere on this site — rarer than the promotional wording or the cycles counted in the gap between what is shown and what is billed.
How rare, and how large
Of 463 sellers publishing a price, 11 publish two different figures for the same molecule in the same format. That is 2% of them.
The gap, when it exists, is not marginal. The median pair differs by a factor of 3.8, the widest by 15.7, and 9 sellers carry figures that differ by two times or more. A reader who lands on one of the two pages has no way of knowing there is another. That is a different failure from the one-figure-many-meanings problem in what a flat rate costs.
Why a large gap follows from a rare event
Small contradictions get fixed. A seller whose two pages disagree by five dollars is unlikely to leave it, and unlikely to be noticed if it does. The disagreements that survive are the ones spanning genuinely different products or genuinely stale pages, and those are large by construction.
That is why the median ratio here is a multiple rather than a percentage, and why the finding is more useful as a warning about a specific handful of sellers than as a statement about the market.
What to do about it
Read the second page. If a seller has a pricing page and a product page, check both, and treat any difference as a question rather than an average. The same applies to a figure in a FAQ, which is where some of this market keeps its real numbers.
The larger and commoner problem is not two figures disagreeing but one figure meaning something other than a month — counted in the gap between what is shown and what is billed — and the arithmetic for any individual seller is in what a GLP-1 actually costs. Roster read September 2026.