BMW for K5 Blazer and not my DD.
I'd be very tempted. I would have to go over the blazer pretty closely. If it's on blocks I'd also plan on dropping it and going back to a smaller tire. I'd probably make the trade though.
Then again, I'd take a Chevy over a BMW any day of the week so I'm not the best person to ask.
Edit: The closest one to me in good condition is $15k.