Thanks for the mention GhostSixFour.
With regards to the credit card facilities. It's something that we've been looking at implementing for some time. There are additional expenses and risks that have made it an unfavourable option thus far, but we're still looking into implementing it.
Essentially we'd have to increase our prices by roughly 4-5% on each item to make up for the credit card fees and fraud risk. This in itself becomes a bit tricky. You don't want to disincentivise buyers that are paying cash, by giving them the higher fees as well. Yet, Mastercard and VISA specifically prohibit so-called 'credit card surcharges'.
One option is to have 2 prices (one for cash, one for CC). However, I don't know how well that would sit with most credit card users. To the forumites that use credit cards, what would your opinion be on this?