Glad I didn't see it! I have been looking for one for a long time and probably would have hit the button and been in the same boat as you.
I once had a similar situation where I had sold a pump to another old gasser and 2 days later had a fellow walk into my shop and offer $500 more than the selling price! I simply called the old gasser that had bought it and asked if he wanted to sell, and he did! I took out the purchase price and sent him the profit, and he turned around and gave part of it back to me for my honesty! We were good friends then and still are! LOL