Can I add inactive listings to inventory and if I do that will they stay there indefintiely? 

I have Christmas related stock that I have been running a sale on, but would now like to just let them run to the end of the cycle and then hold them back till September before relisting.  They will drop out of unsold after 60 days, but I am hoping that adding them to inventory will let me leave them there longer.  I don't want to use TL as I have two selling IDs and already use it for the other one, where the stock changes regularly, but the account in question has the same items all the time and I'd prefer not to complicate things.