I did a lot of research this weekend, and decided to use multiple venues this time around. I found a lot of great reviews about eCrater and decided to give it a try. I have to admit I'm really pleased!
It's totally free, only google's small fee when you make a sale. The format is very easy to use. I wish there was a "list similar" option, but nothing outside of eBay seems to have that.
I think the fact that your items show up on Google under the shopping area (which is nearly at the top of the search) will be a huge bonus for traffic. I'll update when I see how it goes, but I'm hopeful!
Has anyone else used eCrater? What type of response did you get from it?