If your speakers are in mint and you find a good buyer:
RC3 = $200-250 (Can be found brand new for $275) RF3 = $300-350 (Can be found brand new for $400)
If you want to sell them fast and they are in mint:
RC3 = $150 RF3 = $250-300
If your speakers have damage or blemishs the price drops a bit depending on what's wrong. You'll also have to add shipping which can be high on floor standing speakers.