Worth it if yes, it is a Real contract rifle.
But... Century marked some of theirs as C1A1 (as well as R1A1 and L1A1 and "sporter")
Double check importer, upper manufacture.
If it is a Canadian, then it would be inch pattern. Inch guns can use metric mags but they may be a little wobbly. Metric guns can't use inch mags.
Lots of stuff interchanges between the two. Be aware that inch patterns dont have a last shot bolt hold open, so you adjust the gas in a different manner.
If you want a deal on a FAL right now, I'd go with a DSA Imbel - $1k is "retail" to your dealer, your FFL can get you a lower price. Or check the marketplace on
http://www.falfiles.com/forums - there are a few SAR48 and 4800s for sale which are all Real licensed manufacture, or you can find a quality build. I just picked up a Imbel on a DCI receiver that needs a few more 922r parts (about $80) for $780 w/ shipping and xfer fee.