The seller of the COPO recently sold a 1967 Hemi GTX from the Colorado collection, a previous owner bought it back.
https://bringatrailer.com/listing/1967-plymouth-gtx-6/
"Nov 12 at 6:55 PM
brianrh 2
67HEMI
This car will get a full restoration. I sold this car about 23 years ago for $24500.00 and bought it back for $42,250.00 when you do the math I had to take $17,750.00 out of my pocket to get it back. I would have paid more than that to store the car for the last 23 years. This car is not an investment. My 2 boys and I will restore it and they will keep the car along with my wife’s fully restored 1967 GTX 440. This car means more to us than an investment. See 32 years ago when we got married we had our wedding picture taken with us between both of the cars side by side."