Offerup's in-app purchases has been a nightmare. I've tried to make a purchase for a $1000 item, and it's not working. After trying multiple cards, and even trying with my wife's account, we are just getting transaction declined messages. I'm not sure if these are legitimate, or if these are false positive automated security issues. Either way, the fact that OfferUp tries so hard to avoid live customer support is incredibly frustrating. Get live chat, OfferUp. You are big enough, now.