Online Computer Stores?

http://www.newegg.com

 right on uranium-235.  And to prove it go www.pricewatch.com  newegg will be within a few dollars.  If you order multiple things from multiple vendors the shipping will kill ya.  I see that newegg has about the lowest average price if not the lowest price on the net.  Also www.resellerratings.com has some wonderful ratings for it.  If you go with someone else, check in against these site's or you might get burned.