I like 32 revolvers and I like H&R. But a 732 isn't much fun for plinking because of the small grips and minimal sights and heavy trigger. (I had one for a while.) I am very out of touch on prices, so I can't tell you if $345 makes any sense or not. But I don't think I'd be happy having spent it on a 732 if $345 was a significant amount of money to me. At least try to get one of their 4-inch barrel 32s with the square grip - it'll be more fun to shoot.
Oh, as for spare parts, I've had an H&R 999 since 1980. I've needed a spare part once: When I was dumb enough to try to get 9 Russian steel-cased 22 LR's out if at once, I broke the cylinder retaining catch. But then, I won't pretend I shoot nearly as much as a lot of people here, so take that with a grain of salt.
PS - Yes, the Russians made steel cased 22 rimfire. And they exported some to the USA. Why they made it, and why I bought it, I cannot tell you.