how long do YOU wait

I understand that parts listed for sale are for sale until money is exchanged.
If someone asks for a quote and some one else shows up at the front door with cash in hand. The first person to exchange money gets the part.
A request for a shipping quote is not an agreement to purchase. Providing the money is an agreement to purchase.
If the guy that inquired about the shipping quote is suddenly also dealing with an unforeseen emergency, then he should deal with the emergency. After the emergency is resolved then he can resume his shopping.
Price all items "shipped" and wait for the first to deposit the money. Crude but effective on small to med parts with usps flat rate. I'd not attempt to ship a fender anywhere. Headers were about the largest thing i shipped and that was 2 hours of my time packing and driving them to the Greyhound depot. Even that was a **** show as I had to send a map to the receiver on where he could pick them up and he still had to call me from the bus depot to ask where they were. Another call to cpx or whomever the greyhound freight co. Is told me they were still enroute on a later bus....jeez. won't do that. Plenty of local buyers for big stuff for me as I'm in no hurry.