What's with some of these ID sub manufacturers and their MSRP pricing?

MSRP $2125.00 but my price is $850?

....$800 if I buy 2 ??

I'm not questioning the quality of any of these subs as they are excellent performers by most accounts, but there seems to be a marketing war of "how much savings over 'MSRP'" going on between a couple of these players.

Half of communication is listening. You can't listen with your mouth.