The plate number series is late '90s-early 2000s. It's been unregistered for over 10 years though, so either there's a ton of fees or the guy hasn't been paying his taxes on it after non-op'ing it. I do like "since 2000" but that doesn't tell you where it *came* from...
Pretty sure this was the same car. http://www.stationwagonforums.com/forums/threads/1971-buick-estate-wagon.54179/