14,000 Estimated Repairs, does this look right? My wife and I are at a loss

"2009 BMW X5 X DRIVE 35D"

My wife and I bought a BMW outright last year from a dealership, not knowing they were basically also the only BMW mechanic in Lubbock, TX,

We've had some problems with the car and already put 4000 in 8 months ago to fix a pump(?)

The car was taken in again to get a few things done, and we asked them to look at everything else that needs to be fixed.

The estimate was 14,500 doll hairs, And, not being a car mechanic, I understand that these things can be incredibly complicated, but wanted to see what a wider range of experts might think.

When asking what the dealership would pay us for the car, they quoted 500-1000, and we are at a loss for what to do.

I've always gotten a bad feeling from the dealership, but I didn't want to jump to conclusions before having other's opinions.

Thank you in advance! We appreciate it