Test drive it in an emulator first, man. The system definitely ain't for everyone, especially if you have a low tolerance for moonrunes.
As for price, expect to pay $100-150 for a system depending on condition and if it's boxed. The best deals are to wait for a lot (I got one last year for $500ish with a bunch of games, including pricey Zenki and Zeriogar), or to pick one up off somebody in the US that's already paid the steep international shipping but ended up not liking it. The latter happens all to often, sadly, which is why everyone really should try it out first before buying.