be patient and study the market...
If you can't get it at BG, then be patient, sometimes you can get great deals, depends who else is looking, sometimes prices are inflated, just need to know the market... I saw a great deal and let it go, bought some extra parts, and now see the same parts for less... write it down as a reference, do you have a trailer, you can always rent one too...
I have 87 GN hard top 88k, purchased for $6k March 4, 2008, no rust and body is excellent condition, needs 4 bumper fillers, and new paint, purchased 3 inch dual exhaust ss polished cat back, new TA49, new chip, lots of new bolt on parts, I now understand it is a money pit... hobby, ummmm, it is fun, can't wait to see it finished...
The more knowledge you have and where the market is, the better deal and money saved...
I saw my GN#2 on ebay, it looked sweet and in excellent condition, BUT it was not as good as shown, needed turbo, and ac fan blower not working, the hood is the worst I have ever seen, the brakes were gone completely, 2 legs needed for test drive, what might be driver to one person, is not a driver for another, can you handle less than perfect... It is so much nicer to be able to touch it and drive it...