LY6 Swap - Is this the one?

[ajgriffin]

Hey folks, I'm looking to swap a LY6/6L80 into my Suburban, but I need to source the combo from somewhere. I've got my eye on one, but want to get feedback as this will be my first attempt at an LS swap. Here are the details:

LY6 w/2wd 6L80 trans
2008 Chevy Silverado 2500HD (was a street sweeper, not a normal P/U)
150k miles
involved in a rollover accident

Is this worth buying? Too many miles? What would be a fair price? Any non-negotiable repairs before the swap? Anything I'm not thinking of? Any help is greatly appreciated!

I've also attached a video of it running. Here: https://youtu.be/ZS7y9sjQdEU