Sampling of some sort

I was wondering... I really want to be able to play and record phrases on my guitar and save them for later use to play over (like at shows). I would also like to use it for sound effects and such. Anyone know where I can get just a simple player/recorder like this? I want to be able to push a button (with my foot if possible) and turn something on and off and maybe have some tempo control but thats not a necessity. I looked at a Roland loop station but it just seemed to constricting in some aspects but yet superfluous in other aspects. And it was like 500 bucks, but yeah. Thanks guys.