Do you have a list of what you've got? It would definitely take a long time listing them one by one on ebay, and the listing fees would start adding up when you get into relisting things that don't sell immediately.

The main thing you need to make sure you do for anything worth a promising sum is take extensive photos of what you're selling and include any little thing about the condition, even if it seems negligible. Because eBay has a tendency to always side with buyers over sellers and there are a considerable amount of horror stories out there about people losing their item and the money because of this.