EBay, Collectors, Flea Market & Antiques

If you are wanting to get cash quickly, then you should probably auction on eBay. It's the only real online auction solution out there. You might not get "your price" but if you want to move a bunch of stuff, you'll get paid fairly quickly. You can also do short-term "buy it now" listings on eBay but I wouldn't recommend starting there.

If you are ok with listing items and letting them sell whenever, then Etsy should be considered. Etsy costs less to list. The problem here is that it's a fixed price format, so you have to know what you want to sell an item for, and then you wait (months usually) for someone to buy it.

In either case, spend some time studying both Etsy and eBay. Read the user forums, do some searches and see what people are saying about the sites. Pay special attention to ended auctions that are for the same or similar pieces. Look at the actual sold prices and that will help you determine what to expect. Use this information to generate your fixed price listings on Etsy.

Also with eBay, the selling protocols totally favor buyers these days. In the event of a dispute between buyer and seller, the buyer almost always wins regardless of who should win.

Last thought is that you can always sell to an antique dealer if you just want to move stuff. Unless you want to mess around with selling online and all the hassles that go with it, this is the simplest thing to do. You'll get cash and a lot less headaches.