I spoke with the seller earlier today (I did not inspect the car). Here is a link to the listing on Craigslist:
1990 Buick Reatta
He is the second owner as of a couple years ago. Car has some paint issues (roof needs a new coat) but otherwise the exterior/interior is said to be in good shape.
Mechanically, both the brake and anti-lock lights stay lit. Per the seller, an independent mechanic determined it is a bad sensor that will cost $600.00 to replace.
As the car is located just a few miles away from me in the San Fernando Valley area of L.A., if anyone has a serious interest in the car and wants me to inspect, please notify via PM.