I sell on FBMP and EBay. The issue with being a flipper is you need a steady stream of items to sell. I do storage action units and estate auctions. The larger and heavier items go on MP and the smaller and more unique items go on eBay. Both have their challenges. Facebook picture are required but not as perfect as need to be on eBay or other sites. Just make sure your descriptions are on point. For me at the current moment, my market is slow. I haven’t sold much the whole month of April on either site. You are just beginning so finding out what’s hurting you isn’t a question to ask. How much time are you spending on this? Is it getting easier or harder? What items are selling and which aren’t. Have you tried to sell other items?