Eight years ago Colt was not making New Frontiers. The original run of 3rd generation New Frontiers was built in the late 70s and early 80s. Some of them are very sweet, some are a bit rough. The only way to know is to handle the gun and work the action. The New Frontier was reintroduced about four years ago and these are very sweet. The 70s/80s have a NF suffix and non-removable cylinder bushing. The new ones have an NF prefix and the removable bushing. I have both and like them both. Price wise New Frontiers are almost always less expensive than regular SAAs. The way Colt prices are these days, if you can find one under $1500 it is likely a good deal.