For BIN items you could use the Good Til Cancelled option. I personally prefer not to, to keep control of the items I am rotating in and out and to save my 6 cent listing fees until the bitter end of the month to get the most bang for my buck in promotional store fees. (Store with 250 free listings). For Auction listings unfortunately your only options are 1,3,5,7 & 10 days.
-CM
