How long is reasonable?

I had several sets of door edge protectors for sale. had buyers for all 7 sets in one day. 2 have paid and I mailed them right away and they have recieved them allready. I have only heard from 1 other potential buyer. the others have not even been in touch.
How long is reasonable before I put them back up for sale again?
ohh and fyi it's been a week now.