I sell 50-60 items on eBay
every week, but every time I start to sell a new collection or a different batch of stuff the buyers are a little slow to gather. I've learned to start slowly and not list the best or the worst but some middle level material. If I plan to sell 15 items/week from a collection I'll start with 5 items and then 10. It seems like fishing to me and I have to chum the water. I really believe in a low starting price because the early cheapskate bidders might come back later.
Another strategy is too list a few items for auction and at the same time put the good stuff up at a fixed price.
The best way to see if you like it is to start.