Owned by a family member who told me to make him an offer. It's been parked in his back yard for years. Ran fine when he parked it just upgraded to something nicer and didn't drive it anymore. It has a clean title. We changed the oil and checked other fluids, dumped a few gallons of gas in it and it starts but doesn't want to stay running. I'm sure bad gas and carb is probably all gunked up. Just based on this and pics what would you say a decent offer would be?