Hey, I was interested in the kid's bike you have listed for sale. It looks like it's in decent condition, but with you being the second owner and all, $20 seems a little high. Would you consider taking $10?
Hi we are the second owners but it's well taken care of. I even have the hardware to put the training wheels back on. 
I think the highest I'd be willing to go is $12, but I'll come pick it up myself. 
I can do 15 since I did do some work on it to make it in top shape. Still a great price that covers my costs.