The options grow daily, but you always have to balance traffic flow against fees. Listing for free is great, selling for free is even better, but if there is no or low traffic flow, then making no sales at all isn't that good!
Dale, one of our members here is having some success with addoway, ecrater and bonanzer are another couple that have decent traffic flow and usually show strong signs of growth in the market place, so a few there you could try to kick it off.
My theory, if it costs nothing to list and doesn't suck up all your margin with sales fees, then what have you got to loose other than your time listing stock.
Just don't relay on free sites as your primary marketing tool. Not many sellers love eBay, but the fact is buyers do, and if you're in the game of selling, you need to have your products in front of as many buyers as you can get!