Daewoo rifles basically come three ways:
1)K1A1, Max-I, AR-110C are all the same rifle imported by different folks. This gun has a wire telescopic stock resembling a greasegun, and uses an M16-type gas system. There is no piston. They use M16 mags.
2)K2, Max-II, AR100 are all the same rifle imported by different folks. This gun has a side-folding stock. One of the best designs for a side folder by the way. They use an AK type gas system with piston, etc. It is the standard rile of the ROK. It uses M16 mags.
3)DR-200, DR-300 are the post-ban K2 (etal) with thumbhole. The 200 is .223 and the 300 7.62x39.
All the Daewoos are well built. The factory has been making M16's for decades under license from Colt. They began making the newer rifles when the ROKs wanted something better than the M16A1 and wanted certain features and a "homegrown" rifle. All the Daewoos in the states suffer from parts shortages in that there is no easy source for spare parts. Some AR stuff will work, much won't.
The K1A1 you're looking at is a very nice compact carbine. Think of it as being as good as a CAR-15, only able to collapse shorter because of the stock set-up. Not the most confortable stock to shoot with (as any wire stock is), but a VERY handy gun.
I've had a K2 for a very long time (before the ban) and I don't worry about spare parts.
The price you're looking at is fair dinkum.
Rosss