DANTES/Excelsior Notes on Ebay

I found these study guides/notes on Ebay.

Does anyone here have experience with these sellers?

http://stores.ebay.com/Excelsior-Students-Study-Stuff_My-Notes-Study-Guides_W0QQcolZ4QQdirZ1QQsclZallQQsotimedisplayZ2QQtZkm


http://search.ebay.com/_W0QQgotopageZ1QQsassZxhopesfallxQQsorecordsperpageZ50QQsosortorderZ1QQsosortpropertyZ1