Wonderful until it stops working

I got it used from eBay, but with a 1 year warranty from that point. It worked very well, took great pictures, and the movie quality is exceptional.

However, the shutter button eventually seemed to wear out and it was always half-depressed, making it difficult to take pictures since you're supposed to press half-way to focus, and then the rest of the way to take the picture. Later it started having battery trouble, where it wouldn't turn on 4 or 5 times in a row, but then it would turn on and be fine. Lately, the autofocus seems to be broken, focused in very close and it won't change at all.

It lasted me over a year, the price was good, and the pictures were great, but if I can't get this resolved I'll be getting another camera soon.