For years, I only had the gates in
my Presonus ACP-8. They pretty much aren't worth using except on snare, toms, and the right background vocals. I hardly ever use them. But lately, I've found I'm using them more often. So, I finally decided it'd be worth it to get 1 nice 2-ch. gate.
I myself almost went with a used, great condition DS201 and was going to have the Audio Upgrades mod done to it. But after talking to Jim Williams, he said while
the DS201 and his mod for it is pretty good, the Aphex 622 stock is just as good if not better. With his mod for it, it's the most unabtrusive gate with the fastest slew rate he's ever seen for a gate.
I paid $225 for a used, absolutely mint Aphex 622 + $15 UPS shipping + $125 for the mod + $11 UPS shipping = $376 total.
Most definitely worth it for me! I FINALLY feel comfortable putting a gate on lead vocals on the very rare occasion I feel it needs it.
Anyway, I wouldn't hesitate using a stock Aphex 622 (used in good condition) for a good price. And when I had the extra money, having the Audio Upgrade done to it.