That sounds like a great way to save some money, especially since the higher end scopes also have good warranties if something is wrong with a purchase.
Do you buy them mostly face to face, or online? I don't see many deals on used scopes where I'm at, but maybe I'm just looking in the wrong places.
I try to watch for stuff on here, but so far I've always been a day late and/or a dollar short.
The time to buy is when they bring out a new line. 1st gen Razors have been a good value for a while and will eventually be back up.