Test ride a private seller's used board?

I've come into some cash, which instead of wisely investing I'm going to fritter away on a second surfboard. I bought my first - an old Stewart that was formidable in its day, but is now waterlogged, and with many stress cracks . . . kind of a 1988 Chrysler LeBaron of surfboards - about five years ago, though have only been going out regularly for about six months now. Although I had it patched, it couldn't be made any floatier than it already was. I was a beginning surfer and a beginning buyer. I am still a beginning surfer, but there are things I now know to look for, to avoid, etc., that I didn't then. I still feel, though, like I'm not going to really know how well I'll take to a board without riding it first.
I'm wondering how many folks have been able to talk a private seller into letting them take a test run before buying a board. You leave them a deposit, and maybe your driver's license . . . I don't know. This seems like a stretch, but there are some very nice boards on Craigslist locally that I expect I'd be paying another couple hundred bucks for if I bought them used from a shop. Or is that extra money just worth it? Or should I just get a brand new pop-out epoxy board that I at least know will float?
All I know is, I'd like to have a board that doesn't actually go under the water the moment I lose any speed. (Which I do, because ... beginner.)
Wisdom, experience, appreciated.
I'm wondering how many folks have been able to talk a private seller into letting them take a test run before buying a board. You leave them a deposit, and maybe your driver's license . . . I don't know. This seems like a stretch, but there are some very nice boards on Craigslist locally that I expect I'd be paying another couple hundred bucks for if I bought them used from a shop. Or is that extra money just worth it? Or should I just get a brand new pop-out epoxy board that I at least know will float?
All I know is, I'd like to have a board that doesn't actually go under the water the moment I lose any speed. (Which I do, because ... beginner.)
Wisdom, experience, appreciated.