I also set up a shop for the club on it's facebook page using the same application I use for my own (payvment) this app allows you to sell direct through your facebook page. The shopping cart payment is powered securly through paypal so facebook itself doesn't get access to anyone's payment details and customers don't even need a paypal account as they can pay using debit/credit cards as a paypal guest. To see the shops click on the "shop now" icon to the left under the profile picture on facebook.
Also payvment have recently launched a new service they see as being a potential contender to the ebay crown, anyone with a facebook shop can now opt for their items to be available in a global Shopping Mall marketplace. It works similar to ebay so items come up in search according to their relevance and again all payment is through paypal. It will be interesting to see if this gets us any more buyers and facebook visitors!
In the meantime if you have any enquiries about getting custom items of clothing/merchandise made up just contact me. I specialise in small to medium orders (of one-offs up) and you're not just limited to t-shirts, in the past I've done bags, aprons, hoodies, hats, laptop covers, phone covers, fashion & sports tops, wallets etc so if you've anything in mind just ask!