I have major problems with the USPS site... for some reason, it gets all the way to 'print' (AFTER deducting my $$ from PP), then closes and says there's an internal error and 'try again later.'.

I have two claims in with them as we speak (USPS) for labels that can not be printed but have been paid.

Will try the link you posted next time for 'off Ebay' transactions.