More data first:
1. How many hours does the machine have on it (hrs)
2. When is the 12 yr point? (date)
3. How many hours a year does it fly? (hrs)
4. Who owns it (sch/ pvt owner leasing)
5. Supply side - how many within 100 miles (#)
6. Demand side - how many hrs SFH sold per year (hrs)
7. Demand side - how many hrs TGN sold per year (hrs)
8. Exact type (type details)
9. Fit (7 hole/ 9 hole/ much avionics etc)
h-r