Cards: 85% of the market comparable on the day you ask us, for 12 months. Two things follow from that. It is the comparable and not our asking price, so a card we listed above the market does not carry an inflated promise. And it is the comparable on the day of the request, not the day of the purchase — ask a year from now and you get 70% of what the card is worth a year from now, which pays you more if it appreciated and less if it did not. We publish the comparable and the sales behind it on every card page, so you can check the number before you ask and again when you do. Lux: 70% of what you paid, for 12 months, a fixed amount — Lux has no comparables feed behind it yet. Trends: the published table value for that device, which declines on a schedule you can see on the product page before you buy.
These are guarantees, not estimates, and they appear on the product page before checkout rather than in the terms afterwards. If the market has moved up, you are free to ignore the buyback and sell the item to us at market instead.