http://www.paypal.com/cgi-bin/webscr...y-fees-outside
for the personal accounts, you can only receive 5 payments per year that are funded by credit cards, and for these, you will still be charged a fee. For other transactions, for example if someone pays you from their bank account or paypal balance, I don't see what, if any, limitation there is.
FYI if you sell on ebay, you can't say you accept paypal but specify that they buyer can't use credit cards though paypal, as a way to avoid having a business account.
Sedonia