Online selling etiquette

I had a indecent on some PS brackets that a member commited to on January 3. Asked for price I agreed asked for my pay pal then next day said he ran out of time and would send it the next day. Then nothing crickets. Nothing for 6 days. So today I sold them to another member.
Hey but that's ok. This is the way I do business. If you commit, I will wait for a reasonable amount time.