George Washington 1867 Stamp For Evaluation

Hello ,

please, can you help me to evaluate my old stamp 1867 George washington and tell me what value it has.

it seems to be very rare stamp

thank you
Ric

Looks like a an F-Grill, which would make it a Scott #94, with a pretty common circular cancellation. It's a nice wide margin on both left and right, natural straight edge at left, perf slightly into the top of the design. The CV of this stamp is around $10. It's possibly an E-Grill, which would make it a 98, slightly higher CV of $28.
Not rare... just the grilled version of the 65, the most common stamp up to that date (1861).