Hey Nico,
- If you list on AutoTrader or online, list it around KBB retail price and recommend limiting test drives for serious buyers only where the sale price has been agreed to.
- Reach out to Aston dealers in your area to see if the used car sales manager would list it as a consignment sale.
- If there are tax incentives in the state where the seller is, consider trading it in towards another purchase. Lot easier than selling a high end car retail.