This tail light is 99% fine - it has a tiny fracture which may require a sealant or patch to keep moisture out (shown in last 2 pictures).
This part retails for $433.16 + tax. If you can fix the tiny fracture this can be a huge savings for you.
Came off of a brand new Yukon which had only been on the road for a couple of months. Comes with bulbs. Part #23242567.
If you have any questions, don't hesitate to ask.