As long as your account is active, indefinitely.
If you stop subscribing, the first maintenance after 60 days of character not being logged in will clear the market slots.
@Catwhoorg "Rule of Three - Finale" Arc# 1984
@Mr Falkland Islands"A Nation Goes Rogue" Arc# 2369 "Toasters and Pop Tarts" Arc#116617
I have a few toons that are influence/infamy capped that have things in the market that have sold. If I attempt to collect the money of course I won't get all of it. I don't want to transfer money right now because I am getting ready to spend a bunch of it on builds. So question is how long can I leave items sold (have already sold, not just storage or for sell) sitting in the market window without cashing in for my moolah??
tyvm in advance for your wisdom