I would love some feedback on a project I have been working on here and there for about a month. The idea is to make it super simple to sell something without having to setup a store. It is just one form to post your product. You can easily sell a book you have sitting around, a dress you made, access to a url, or allow people to purchase a file. You can check it out here: http://bop.ly. You can also see something I am selling here: http://bop.ly/DgRF1
I'm working on something related to this. If you like, I would enjoy sharing my project and discussing marketplaces further with you. (My email's in my profile.)
I guess a couple of reasons 1) you can use Boply to sell digital goods like urls or files. 2) For non-digital you don't pay an "insertion fee" on Boply like you do on eBay. And Boply is more for quickly posting your item and getting it out to your friends. The use case came from my wife who sews and wanted to have a page to send to her friend's for some of the items she made.
For non-digital goods they seem pretty similar. Boply also enables you to sell digital goods like access to a link or a File that people can download. In addition it seems like yardsellr charges the buyer a transaction fee when they purchase while I just add the small transation fee for the seller. Also Boply does not require the user to login Facebook to make a purchase. In fact it can be done without any login just have to go through Paypal to enter your credit card info.
