Matt Bachand
Depends on the 6.5
Do you bring raw steak to a restaurant and ask them to cook it for you?
I am a believer in purchasing from the installer - no matter what it is....everyone has to make a living...
I am a carpenter and i have done a ton of jobs over the years wehre the customer bought their own material.
Perhaps if you talk to the installers 1 on 1 and see if one of them is interested in doing it on a day off "on the side".
Sometimes paying 100% markup, on top of the installation cost is just customer rape however.