Well I would do some more research on the selling part. Maybe a thrift consignment store, or a place to rent a space to put your things in.
The Flea Market sounds good would plan on the in advance thing if they are packed all the time.
If you are into smalls I would start with yard sale / estate sale finds. Buy cheap and sell high. That would build your seed money up. Don't know smalls but know furniture. We hit a yard sale yesterday picked up two swivel bar stools and a nice wooden chair for $4.00.
We have a consignment thrift we use. Sold the Bar stools for $20. After her 20% and the actual cost of $3.00 we made $13.00 Profit. I know dose not sound like a lot but if you do it a lot it will add up.
I use CL and a local on line classified, find the ones that say must go, one day only ect.
The small lockers or ones with smalls are going for a lot of money at the auctions here and else where. So I would start poking around different avenues for selling, there is almost always garbage and furniture in lockers. So would check out your local Consignment shops, thrift stores ect.
I wish you luck and do attend an auction they are interesting and fun. You may not like what you see and decide on something else but at least you will learn something. LOL