Sarge, you know as well as I that you're not going to get anywhere close to $80K on a '17. (If you can, more power to you). Many '18's and even some '19's are being sold in the $80K-$90K range. We're already heading into the 2021 model year and your car will be 4 years old. You're looking for that one "needle in the haystack" and as DSGT said, you'll be looking for a looong time. Meanwhile your GT sits and keeps losing value.I think you totally missed my point! lol I am saying due to the dated, tech, etc on my '17, I should take the $80k and run, which is what I am doing.
I think one possibility might be to try the auction market to see if you can lure that one enthusiast.
Cars and Bids (which got started by Doug Demuro) is one example which draws a lot of unique cars and buyers.