Thanks for the replies, everyone.
Trades are a non-issue with me. They'd be "cool" to have, but I'm not looking for cool, really. Rather, I'm looking for a quality GBB I can use for practice that will last me a long time. I've got experience with KSC/KWA from back in the day, so I trust them, though TM and a few others makes great GBB's as well.
Regarding the import issue. If I were to order one and it got caught by Customs, I'm assuming they'd confiscate it and I'd just be out the money I spent on it, yes? I'm not sure that's a risk I want to take, if that's what'll happen.
ETA: I'm also looking for a G19, not a 17. Significant size difference there, and I'm trying to maintain the same feel I'd have when using my actual G19. I appreciate the heads up, though!