There are some folks that still use older machines. Myself being one. I have the machine I mentioned and also the coil you have. It detects with that coil deeper than I have wanted to dig so far. It's fun learning and using the old machine. I"m sure if your looking to sell it someone will be interested. As to what it might be worth I can't help you there, but I'm once again sure that someone on here will know and if not them check out some of the vintage detector forums, I'll bet you can spark some interest there.