Amazon Secret Santa

Last year I was involved in an Amazon Secret Santa, which got rather large and as a result didn't work very well. I resolved that this year I'd organise one solely based around the UK. I am struck with a sudden bout of lethargy though, and I'm not sure it'd be a good idea.

The idea is that you buy something/s off your giftee's Amazon wishlist, to the tune of £15 (in order to get free shipping). What do you think?