You can also reduce the pirce a great deal by buying a cheaper, used kit, and adding what parts you want new. If you're going to use US compliant trigger group, stocks, gas piston, etc. then those parts really don't have to be new. You can find used kits with bad barrels for $150 and get a brand new barrel for $100 easy. That would knock $100 off your price to begin with. It all depends on what you want in the end. If it has to be ALL NEW, then great, go for it. You'll have a great FAL at still a great price. If you're reparking everything to match anyway, a kit with finish wear but no damage that's much cheaper than "new" isn't a bad idea, especially when you need to use a bunch of brand new US internal/stock parts anyway.
I personally like "new" and "used" both. Each has it's own "charm".
Building a FAL is easy enough, and you have the pleasure of actually building your rifle. That's actually a plus in my book.
Ross