Are quite an easy way of web designing, but many hate them, and I converted my site from frames and used iframes instead.
Frames are generally disliked because document readers won't read the whole page, and also people can't bookmark particular pages. Essentially sites with frames don't get a particularly good press here!
Otherwise the site seems pretty clear and says what it wants to. There are a few little things that aren't quite aligned - sometimes the view basket overlies the image of the card you're trying to sell. The navbar also 'seasonal' in bold, plus 'special friends' is also not aligned properly.
There's a bit more work to be done - websites can be a huge headache - but perservere, and people here will be more than happy to help!