I was interested in buying a used HVX200. I looked on craigslist and the prices have really come down. I've found 2 or 3 that are priced between $1500 - $2000 and come with P2 cards, a tripod and a couple batteries, plus whatever comes with the camera new. What do I need to check, so I don't end up with a brick? I don't plan on using tapes at all, just P2 cards, so I'm not really worried about tape heads. But that's the only thing I know people check.