No arm wrestle here but if they already told you "not to waste their time, their bottom line figure is a purchase price of 49,500 7,075 off MSRP" and if The vehicle is 100% the way you want it. It's in excellent shape, drives great. and you can't see getting a "near" new X5 configured this way much cheaper then it sounds like you have your mind made up.

Go for it

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….