Yours is Proof 55 Brown A Proof 66 Brown once sold for a record $3,220.00 so Yours might have a high premium but not as much.
Actually it could go for quite a bit of money. People that build working man registry sets would probably pay quite well for that piece. If there are proof pieces needed for those sets. Those sets can't have grades over 58. I would dig around on the PCGS web site and look at those working man sets. If it doesn't fit in a registry set I would say it is a tough sell. Max $60.
They're called Everyman Sets. I briefly looked through the Indian cent registry and saw no special consideration for proofs.