Without a doubt, I'd go for a Blackwater Gear 04140 Noryl Folder. It's, pretty much, a Benchmade Griptilian, made in cooperation with Benchmade, and unlike many of the BM red line, it's actually made in the USA. It's the exact same thing, and yet, I only paid $50.00 for mine (labeled $49.95).
Although they're not made in the US, however, the BM red line are nice. I particularly like the HK 14300S. Another great choice is the Spyderco Native FRN from Wal-Mart. Both of these were $40, each with their own pros and cons.
I also agree that the CRKT M16-13Z is a nice knife, despite having AUS-4 steel. Most consumers don't really care about the steel differences, and though I do care about it, it's still a great knife. It's a beater, something I can throw into a toolbox or my truck, and not worry about beating the hell out of it. I subject it to tortures that I'd never do with my Benchmade knives, and it has always worked great. And for only $30, it's a great consumer knife.
Out of the "cheaper" knives, a great choice is also a Buck fixed-blade knife. I'm unsure as to the model number, but it can be found at Dick's Sporting Goods for a mere $20. And I've successfully given it an edge comparable to Benchmade factory edges.
But, in the end, I go for my Blackwater / BM Griptilian.
