Three vendors quote you for the same compound. One sells 10-vial kits at 30 mg, one sells 25-vial kits at 36 mg, and the third has a quantity break at ten kits. The headline prices are not comparable at all.
price per mg = price per kit ÷ (vials per kit × mg per vial)
That single number lets a 10-vial kit and a 25-vial kit sit in the same ranking. It is also the only fair way to compare two strengths of the same compound.
Rank once at the single-kit price and once at each vendor's best volume tier, because the winner changes. A supplier quoting $245 a kit against someone else's $196 looks expensive — until their ten-kit tier lands at $165 and the other has no break at all.
Lab testing, customs and reship fees are real costs and belong on the purchase — but they must stay out of the per-mg vendor ranking. A fee you paid a third party says nothing about whether that vendor is cheap, and mixing it in makes an honest supplier look expensive.
A supplier who is $0.02/mg cheaper and three weeks slower is not cheaper if you go out of stock. Track order and arrival dates and let the average — and the spread — sit next to the price.
In the app
Every figure on this page is something PepStock keeps without being asked — landed cost per batch, each purchase's own cost, what every reseller is holding, and the per-mg ranking at one kit and at ten.
