I love using Offerup. The platform is much easier than craigslist. To help avoid the flakes I try to put on my post “Message when you are ready to purchase” or something similar. It helps weed out some of the people who just message to message.
@Mccloskey1978--In the description I put serious buyers only/serious inquiries only. Sometimes you'll get many people with a lot of questions, that's why encourage you to put a detailed description for each item you're selling. Welcome to the OfferUp Community Forum!! I hope you have a great time interacting with other buyers and sellers, along with community members!! Have a great day!!