Hello from northwest PA! (Long post)

I agree with your view that it's best to keep the car in your family, as a tribute to and reminder of your brother.

My own car is far from original, but remains "matching numbers" and having worked on the car with my son for 2 years, made good friends in the process and spent a small fortune (my guess is about € 45,000) I couldn't bear to part with it. For the next 36+ years the car will remain in my family.

I can imagine what the car looked like after spending years in a garage. Last week I owned a Moskvitch 408 for about 3 hours ; my son and I took the trunk lid and cut off the rear fenders (with the lights) and scrapped the rest of the vehicle. The blue paint looked like a dried riverbed.