From the seller:

I've followed up with everyone whose DM'd me. The action item is to take the car to my local BMW speciality shop to have it evaluated, inspected, and for any repairs to be priced out.

I have a spreadsheet of folks who are interested and will relay the inspection details to them. Based on that report - I'll hone in on a reasonable price.

I don't expect to have any update until early to midweek next week.

I'm guessing the new price will be higher than $13,500

Accidents are mentioned but not a salvage title. The miles aren't too bad and the exterior is in decent shape. It looks like it may have an aftermarket exhaust. The rest looks stock. Even needing some mechanical work it's a steal. There are already offers of $16k in the Facebook comments.