if it's costing more to warehouse them than the money received from the sales why not contact some charities to see if they'll take the items as a donation? possibly you could just stop paying the rent and then likely the landlord can put the stuff out to auction - how long that would have to go on would depend on state law. if you want to do this read your lease carefully to make sure you won't be on the hook. you might look to sell the stuff to a secondhand dealer. this is really a question of economics.
