You ever heard of the
paper shredder? Anyways, Anand got one that does electronic parts. What he does is once he finishes a review, he puts it into the shredder/grinder and it just chews up video cards, sound cards, motherboards, 2.5 ghz processors, 512mb of ram, dirty socks, old laundry, discarded cigarette butts that missed the ashtray, Apple 24" Cinema Display LCDs, and CTR monitors, etc.
j/k.

Most of the time, reviewers have to send it back to the company. Sometimes, they get to keep it though, that's when they keep it for themselves or friends, or have giveaways. Sometimes a review site will strike a deal with the company where they do sexual favors for each other and the review site gets to have a few computer items, T-shirts, old sneakers, and hats for give aways.