Maybe their lack of resale value has something to do with it being a front engine car. Porsche made no secret of the fact that this car was going to be the eventual replacement for the 911. 911 fans wanted no part of that. They kept buying the 911 and instead of replacing the 911, the 928 was sold side by side with it. The 911, of course, outlasted the 928.
The 928 was more refined than the 911, but it was still quick. 60 MPH came in 6.5 seconds and it's electronically limited top speed was 140 MPH.
According to a few websites the V8 engine in Euro spec put 237 HP (The seller writes that it's 230 - I don't know if he had it dynoed or is taking into account the federalization done to this car. OR, maybe he's right and the websites I looked at are wrong. That wouldn't be the first time that's happened.), vs. 219 for the US spec car. The Euro cars also had better headlights and, of course, European gauges. There were also some other slight differences.
This car is a 5 speed, which is somewhat rare and very desirable. At least here in the US, most 928s came with a Mercedes sourced automatic.
The price is a very reasonable $3250.00. There are few cars with this type of performance and pedigree available for that kind of money.
The seller has a Picasa album with 41 pictures of the car on it. You can find it here.