Let's just say if you're in the niche that Rez caters to, then it could be arguably one of the greatest games of all time. Otherwise, as a standalone for mainstream/casual gamers, it's value is argumentative, but 45 is not a bad price at all for it, especially if you're into unlocking everything and getting highest-scores type of gamer...personally along with Ikaruga, they rank no. 1 and 2 best of the "shooter-genre" of the existing current gen consoles; let's just say even before the reprint, when it was selling for plus 100-150, I wouldn't get rid of it unless I had 2 copies on hand, it's that good, at least to me.
...but then again, this is CAG, so probably 45 is asking a little too much for most. Quick note, the game is a purple back though (CD), so it might not play on some PS2 that are CD-Rom sensitive...
Trance vibrator availability, I've seen them for sale on ebay I believe, however, I'm not sure they're compatible with US systems, so better check first. Never played with it though, but I bet that would be pretty cool.