If Sweetwater says $3,699...it can be bought for much less...I know that for sure.
Take about $400 - $600 off that price. At least!

T4 advertised price $4,999 at Sweetwater..I know where you can get one for $3,450. That's $1,500 LESS!
Why would it be any different for Korg products?

You have to shop around.