WGC got them in for 250USD so,
I say they should cost around the price of a normal AEG.
There's 3 variants all priced at 250$;
the Para m249
the FN Minimi
and the m249 mk2 (full stock).
Also found some chinese company that only make M14's.
http://www.wgcshop.com/pcart/shopper...at=KART%20AEGs
inb4 N-N-N-NECRO POST