I agree, on the GPs - my favorite generation; they still look good, they were dead reliable, drove well, and the interior (while not necessarily upscale) was very comfortable and roomy. Looked a some before I bought the DTS, but as noted, not many around here at all that are not totally rotten.
There's one that lives a few houses down from me, also bright red...It sat in the garage unused until about 2-3 years ago, I guess the teenage daughter in the house became of driving age so the old GP was dusted off and put back into service. It's a little rough around the edges, but seems to be doing well, and I enjoy hearing it's distinctive sound drive past the house everyday.
That custom Corvette from Kijiji also lives in my neighborhood - I remember seeing it around years ago, but I don't think it's been out much lately. Definitely Corvette Summer inspired, and sort of a cool time warp back to the few years where bastardizing a Corvette to that level was acceptable....Not for me, but it does look pretty well done.