Right now for that particular gun, S&W M&P 15T M-LOK, since it is brand new the pricing will be pretty consistent. I personally think this is a good price from a good dealer. I have bought from them in the past and they are good to go. They also do not charge you extra for using a credit card like a lot of dealers do.
$943 + $7.99 shipping.
S&W M&P15T Black 5.56 16-inch 30rd
When you order just make sure you are getting the new M-LOK 15T not the older Quad rail 15T.