The best collectibility/investment value in a FAL is in
either in an original Belgian made FN/FAL (the earlier the
better), or a true L1A1 built in a Commonwealth country on an
original Commonwealth inch pattern receiver. (Such as the
Joe Poyer semi-auto Australian L1A1s that were imported in the
late 1980s.) In the eyes of serious collectors, parts guns--
no matter how nice they are--don't count. If it wasn't actually
BUILT in a Commonwealth arsenal on a Commonwealth receiver,
its just another parts gun. The only exception would be an L1A1
parts gun using a commonwealth parts set built on one of the scarce "Lithgow L1A1A"
receivers brought in by "Eden Imports", just before the 1989 ban. Less than 600 of
these receivers were imported. One of these receivers is currently worth more than $1,800,
regardless of the configuration in which it was assembled. (Just due to the scarcity of the receivers.)
"The deal was made directly with and the brand new rifles were shipped directly from the Small Arms Facility at Lithgow NSW between Sept 1987 and mid 1989 when the Federal ban on "assault rifles" went into effect. A total of 158 rifles were imported and serial numbers range from SAF83005 (which I kept) to SAF830166. S/N's 830039 and 830103 were never received and 830041 was not sold. The original asking price (Adv. in Guns & Ammo) was $1550.00 They can be identified by my address: 'Joe Poyer's Antique Firearms, 380 S. Tustin Avenue, Orange CA 92669' on the receiver. The stocks were Australian coachwood and were finished with a clear lacquer finish rather than the cresote treatment military stocks received."
From a practical standpoint, the profusion of parts guns and "Century" sporters generally function fine, have decent accuracy, and are relatively inexpensive. However, they can hardly be considered investment pieces. It is noteworthy that there is starting to be marginal collectibility in the pre-ban Argentine, Brazilian (Springfield Armory SAR-48s/4800s), STG-58s, and Israeli FALs. Rifles that were imported into the U.S. before the thumbhole stock and flash-hider restriction stupidity began are already considerably more valuable than the later emasculated rifles. Since the supply of the earlier style rifles is essentially frozen, this price spread is expected to increase in the future.