Speaker for RD65 112-What's it worth?

Speaker is out of an RD65-112, chassis dated 3/31/80. Has the Musicman logo on a round heavy magnet. No numbers stamped on the black frame but this number appears on the paper cone:42WT10304. It's dusty but in great shape. What's it worth?

What's it sound like? You had it hooked up and run it under pressure?

so its a ceramic eminence? or is it an EV?

The speaker is fine; no issues. Amp was purchased from the private collection of the owner of the local guitar shop. Demo'd extensively and performed flawlessly. After I took it home it went to the amp tech for a check. Replaced the EL34's. On his suggestion, I bought an Eminence Patriot Texas Heat to get a little more punch and tighter bottom. I am very pleased with it so I thought I would offer the MM original.
Anon, how do I tell if it is a ceramic Eminence or an Electro Voice?