I hate Offerup. Unfortunately, when I have items to sell, they usually sell quicker on this app than anywhere else so I have to use it. I haven't experienced any major problems selling except for the ridiculous offers which I politely decline. I have had MAJOR problems buying however so I will no longer be buying anything on the app. Sellers I have encountered lately are so rude. They either won't respond or act annoyed if you ask questions because they've only provided one picture and one sentence. I'll stick to established retail stores even if it costs more. Customer service is so much better.