I happen to like the PDP 500 series pedal. It has a double chain, base plate, side clamp and more, along with a solid, quick feel to it. Plus you can get one new for under $80.
I'll admit I don't really like the beater, but I had a couple of Iron Cobra beaters laying around, so I swapped it out for one of those, and now no complaints whatsoever.
In fact, I've been contemplating getting a double pedal for my gigging kit (that's where I'm using this pedal), but after auditioning a bunch of more expensive pedals, I think that if I do get one, I'll just get the double version of this pedal. It's only $150, plus it feels nearly as good as the $400 Yamaha pedal I liked the most.