Two customers are interested in my vehicle.
Amy advice how to pick the best buyer?
The first one with the money.
You take a cue stick and snap it in half, throw each end at their feet and say, "There can only be one..."
Used car death match ;)
Select the one willing to give you a deposit or the one who shows up with the money first.
Oh, and if they offer you more than the asking price and want you to ship it; RUN AWAY it's a scam.