I've been watching the price of 125EUR steam prepaid card for about a week now. The price on gg.deals has been sitting at fairly stable 88euros (jumping to 120 or 130 a few times, but then going back down to 88 within about an hour). Once I noticed this, I've refreshed the kinguin page about once /hour (sometimes more) and haven't seen that price at all.
I'm not sure a "wrong price" button would fix it, but something to speed up the refresh on high trade volume stuff might help. Maybe an event-driven update pushed by the keyshop?
Even now the price is wrong and It's difficult to believe that it's a mistake or the stock lasts just long enough to trigger gg.deals price change and it's consistently happening for a week.

