The problem with most Blue Sky imports, & some others, is that they were used & abused by the Korean military. We gave the Koreans a lot of replacement parts, but they eventually ran out of them. Their armorers often made repairs that US armorers would not for safety reasons; e.g., they would weld on a broken/cracked bolt lug. The Koreans never mastered parkerizing; you can permanently scratch a Korean repark with your finger nail.

Some importers, such as Arlington Ordnance, got many good carbines, & repaired problems before selling them. So, there are some good imports out there.

Things are different today, as there are NO USGI replacement barrels available. So, a wise collector will base the value of a "shooter grade" on the quality of the barrel, since even a commercial one will cost $400 including labor. If you can't check out a potential purchase with a muzzle wear gauge, you risk overpaying for a carbine with a bad bore.

Parts (& complete guns) have not been importable for 20 years; things won't get better.

Neal