How long did it take you to decide to sell your car

My buddy had a 1970 duster and was slowly turning it into a strip only car. Indy 245 cnc 408 engine with some good parts and just wasn’t running as well as it should. He spun first time trial on new tires Friday night after a not so good tire heat using the transbrake so on the phone I told him to footbrake it. It ran a 7.10 on that pass but probably should be 6.50’s if not faster. He seemed pretty happy. Saturday he listed it for sale turn key for 18,000.00 or trade for Harly. Sunday a guy brought his Harly and left with a duster7DBB8397-4619-400F-A37F-590E33F152D6.jpegCA8B5F48-EF65-43FD-9DEE-88EAD696A034.jpeg