"Choose between 3 stock designs, black fiberglass with rubber buttplate, Mossy Oak stock with metal buttplate or American walnut with original military buttplate."
It seems like a very low price even for the US. If it is below cost, there are likely very few available and the dealer has very specific reasons for putting on the sale. They may be discontinuing the sale of this item for example? If you take a look at Guns America, you'll see the prices for the M1A are higher: more like $1600 for the M1A Standard with Black Synthetic... .
Auction no. 957487269 looks very interesting though, no reserve at $910... . I'd be a bidder.