It is pretty easy to build a FAL from parts or you can pay one of the gunsmiths specialing in FALS to assemble/refinsih for about $350.
Parts cost
200-375 for receiver (Imbel or DSA)
$129 grade 3 imbel kit from Dans (good parts - need refinishing)
$60-100 for US parts
Total could be under $500 if built at home.