So I did search for. Obj files and bought 8 or more objects. Turns out only 2 were actually. Obj's. And those 2 did not work. I had to research several hours then use two other programs to clean them up so they would work.
Renderosity will not refund my money. In looking at reviews on another site, I see this has happened to plenty of others. They told me to contact each. Obj content creator individually and I guess try and get money back from them?!? Not how it works.
So, I WI be filing BBB complaint soon and recommend you do the same if they have treated you this way. (My beliefs and opinions.)