Not a bass ,but a car . I had a car that ran well ,but was not desirable to own if you had to buy it. Nevertheless I could have easily gotten $500 for it. Someone I knew said they needed a car for their son who was a new driver . I gave him the car . He then sold it within a week,and didn't buy his son a car period. That's not right. If someone wants a deal and gives you a charity story ,and you willingly help them out ,only for them to sell it for a profit is just not right. It's not that you agreed to sell it cheaper. It's that you were willing to help them out in a time of supposed need and hardship. True charity. It's deceptive behavior. Haggling is one thing ,lying is another . It's poor character. If someone buys your bass at an agreed price and then flips it for a profit is ok by me. Nothing deceptive.