I see you are new here, welcome!
100% of the forum members would answer this question because it is no secret how much these boards can cost and the price tag is important to know, maybe due to this you don’t get offers.
A mountainboard can cost 1.5k if it’s “cheap” or a bad ass 4WD monster maybe 6k, you see? With 2WD a proper and reliable MTB is usually beween 2k and 3k in the end.
Maybe best for you is to let a reliable builder build it according to your needs (if you can afford it 
).