Any suggestions on how to get a fair price for a Reginaphone?

Also how do you go about researching selling prices?

It has been in the family for many years. It is in excellent shape and
plays beautifully.  Serial # 2400340. Includes 6 copper disks and
4 copper/tin?? disks.

Appreciate any help you all can provide.  Thanks, kevin

 [ Kevin is not a subscriber, so please e-mail to him as well
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