Just sounds like three times you sold bikes for too little. Big deal. If you want to be a flipper then why dislike someone else who is playing the same game. Smile and say good job, be smarter next time...

Any sale I've made I've been ok with. I've seen one get posted for way more than I sold it, then watched it whittle down to 20 less than I sold it to him for. Got a kick out of that but either way, I made sales and that's the end of the commitment for me.
Timing and a certain buyer comes along and boom, more money.