I have never come across this service in the past. It's good to make your purchase on purse.io where you could get most of the products that are listed to the Amazon. Also few trusted members of our has been running online stores with lots of products. You could search and find it out as everything is purely with escrow service.
Purse.io is for Amazon orders only, and the guy is looking to make a purchase from items list on eBay. It's a few months since I used Purse.io but I have never seen that we are able to buy items from eBay.
All4BTC.com is the only site that I know for eBay. There is always the solution to find a website where you can buy eBay gift cards and pay with Bitcoin like eGifter.com