Original owner. http://www.ebay.com/itm/1973-Chevrolet-Chevelle-Laguna-/272692305013?_trksid=p2141725.m3641.l6368 Is the body colored (versus chrome) rear bumper correct? I find differing images online.
For the '73 Laguna, the body-colored rear bumper is correct. Has a different nose than your normal Malibu, as well.
A guy I knew in High School had one of these. It was the S3 package. It was hugger orange. He and his Dad had fixed it up. It wasn't very quick when they got it, but a little massaging and it turned out to be one heckuva car. The one in the ad looks like a very nice example.
It still amazes me how many "performance" Chev's were made with bench seats. If that were a 442, GS, or GTO that would be a rare car. But pretty common on a Chevy
GM was at least clever at marketing their products to look even better in advertisements. Strange that you'd have to order on the "Perf0rmance" Chevy what was otherwise standard on any other GM brand. If you didn't order buckets and console, you'd be commiting automotive blasphemy. Here's what the '73 Monte's interior looked like: