With the continued high prices that T206 back collectors are paying, you almost certainly will leave money on the table by setting prices on the B/S/T. Not to mention you'll have the pleasure of dealing with lowball offers, unanswered emails, one-sided trade proposals, slow-paying buyers, etc.
I suggest consigning to an auction house. If getting the money quickly is a concern,
Sterling Auctions runs monthly auctions, and they continue to realize strong prices on T206s.