If you know something that has value, I'd sell it for STEEM or fiat or anything else. But items that are of low value...nobody would want to pay money for them as they are hard to price and agree on, but, people can still be incentivized to exchange stuff with each other while earning the token and then bid with it for items they perceive valuable to them. Getting free stuff essentially. And who knows, in the future, it'd be possible to spend STORS on actual brand new store items as well. This is tokenizing the exchange of goods you already have, rewarding you with SMT for liquidating your stuff by offering it to others. I think it's cool. We'll have to see it action, or experience it I guess, to understand the value.