6th Gen ZL1 is a great car! I recently sold my 2017 SS 1LE in anticipation of a C8 Z06. The SS 1LE is basically a ZL1 without a blower (455 vs 650hp).
Absolutely LOVED the car. I am thinking I should have waited a little while longer before letting it go
As cjfirstgen mentioned, the ZL1 cars hold their value very well and are relatively easy to make bigger power. I also agree they are best bang for the buck out there.