How unfortunate that the bitcards from 'global standard bank' show up prominently as an ebay 'suggestion' on your link.
http://www.ebay.com/itm/50-Bitcoin-BitCard-Digital-Currency-/120780930821?_trksid=p4340.m263#ht_500wt_1413These guys:
http://globalstandardbank.com/ look mighty suspicious to me.
These so-called bitcards can supposedly be 'converted back into digital form', but I suspect that the private key is not actually in the card and it relies on their database and website to convert. That's if it's not an outright scam. I haven't seen a presence from 'global standard bank' in the forums.
(edit: also - the 'activate' & 'authenticate' links on their website don't seem to work)
Good luck with the ebaying Casascius... I hope people can recognise the value of legitimate BTC product such as your coins and bitbills compared to questionable things like the bitcards above.