Any question answered...

I'm in the market for a GPS, but ideally one that will just track where I've been. I don't really need one to navigate by, directions written on scraps of paper, or other people's knowledge will suffice for the time being. So, does such a product exist, and are they substantially cheaper than one that will allow me to navigate (give maps, directions etc)?

Can't you just look behind you if you forgot where you've been?