I just checked ebay.
0 - '87 911's
Lots of '86's.
My local Craigslist - 0- 87's.
Hold out for your price. There's not as many 87-89's for sale as the earlier models. The G-50's should command a premium, plus you have low miles, less than 4200 per year.
Of course I only want you to sell yours for high dollar so mine is worth more