I think it is legit, but you have to order it from the dealer and the price appears to be $90,000 with a 300R and trailer if I read everything correctly. They might give you a bit off that price. Not sure how long you would have to wait for the boat to be built. (in other words how many there are ahead of this order in the production line). If you are interested, call them and see what they say.
Still a crazy price. I've bought a lot of new Checkmates over the years and usually got up to 20% off MSRP and certainly never gave a dealer their asking price. I guess those days are over.