Their prices vary depending on TV size and whether or not you buy the TV at the time of service. You'll want to visit the store and talk with the Home Theater or Magnolia team directly.
I love Best Buy as an Elite Plus customer, but their TV mounts for 65 inch TV and mounting service is over priced under value. I went on Amazon, bought a nice mount and got it installed for under $200 brackets and install, which would've cost at least $600 at BB. I did buy the 65 inch TV at BB.
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