Possible Clues:

• Flip, as a house
• Scalp
• Flip, in a way
• Work at a flea market
• Make sail once more, by the sound of it
• Act as middleman, perhaps
• Go for another sail, by the sound of it, but at a price
• Scalp, e.g.
• Scalp, as tickets
• Unload, as a used car