I honestly wouldn't buy anything. There are SO many free sites you can use! If you do a quick search here, there was a thread with a ton of the links posted. A few I can think of off the top of my head are: www.rollip.com www.getpaint.net
-- this is a free downloadable program. Works almost exactly like PSP www.picnik.com http://lunapic.com/editor/
There are lots more, but that's all I've got right now. I love editing photos, but can't justify the cost of some of them.