Next in Line

If you're selling something and someone expresses interest but then doesn't reply for awhile, how long is it polite to wait before you move on to the next person in line? I thought that would be in the rules somewhere, but I don't see anything.

 

It usually varies from person to person but I usually wait about 2-3 days as you never know whats going on with the other person IRL! I send a warning message saying if you don't respond within the next 24 hours, the toy will be sold to the next person in line! That is safest and polite way to do things so that way everything works out fairly!