@thomasknoll Alex, Crystal, and I have all had this pain when we were starting our own marketplace startups. We ended up selling our company to eBay and building tools like this in-house, but all of our friends that were starting marketplaces were having the same problems we did. So we quit ebay 2 months ago and have been hacking away since!
Over the last 6 years working in the marketplace space, I've seen an explosion in people starting marketplace companies. Mobile has been a huge driver for the sharing economy as well as reputation systems have become better/easier making people more comfortable to try out new marketplaces like fiverr and many others.
trakkin.me