If you know how to sew you could even Re-Upholster couches and chairs that get thrown out. If the frame is of good condition, you could create new cushion covers as well. You could buy a dry/wet vacuum and clean the cushions before you Re-Upholster. You could probably spend about $20 for materials and sell a couch for $75. If you find kitchen tables and chairs, you could re-sand and paint/shellac the wood, and create new seats with fabric. A piece of wood for the fabric and a little padding to wrap around, sew it up, and staple it to the bottom of the chair frame. You could probably get $150 for a table and 4 chairs.