Problem on paypal and ebay?

I am trying to buy some iphone 4 cases of ebay and there are multibile colors and in the description it says send a paypal message right after you buy one i aready bought one and i couldnt find out were and they say how but i dont see it mabye its updated her is the link to what they say http://cgi.ebay.com/Silicon-Bumper-Frame-Case-Cover-Apple-iPhone-4-4G-/110560882287?pt=PDA_Accessories&hash=item19bdf12e6f#ht_5259wt_963