If you look closer, you'll find that the "Yeah Right" T-shirt from Skate America is only at a cheap price if you but Xl, and is still $20 for all other sizes, and then it is $20 for standard shipping, and almost $40 if you want it within 3days, so I think it would be cheaper to get from the Uk mark,
Theres a skateshop near me that has sweet landscape t-shirts, for about £20, so you shouldnt be looking at more than that :-
Cheers
Tom