buyers remorse

buyers remorse, we've all had to deal with it at some point in time, be it a food item that tasted bad or buying a piece of tech just to have the latest version come out a week later.
so continuing on about buyers remorse, one of my friends is a bit of a collector but it seems he wants to sell off some of his figures, I've known that there were a couple he had that he wasn't happy with (paint was messed up, didn't want the figure as much as he thought he did, etc.) but I didn't know there were so many he wanted to get rid of.
he wants my help to sell them, although he has offered them to me first for purchase (there are a few I'd really like to have) but I fear I might get buyers remorse myself if I spend too much for them, there are a number of things I want to buy but I don't think I could pass up such an opportunity to attain certain figures, on a side note I don't know where I would even put them as I have run out of shelf space (and space in general) but I don't know, I guess I'll wait and see how much he wants and then make a decision.