There is a place near me that says they will buy...not consignment, they just buy your stuff and then sell it. I'm wondering if it is worth it?

For instance, what do you think would be a fair price to be paid for a Talbots classic looking sheath dress? If they offer me $10, I won't know if that's the norm or not. Plus, the dry cleaning they require first would be more than that!

Any experiences to share or advice to give?