Surrey hardtop, if in good condition may add $2000.Collector car insurer, Hagerty, has a valuation tool on its website. This should help you (at least it'll get you started).
Classic Car, Truck and Motorcycle Values | Hagerty Valuation Tool®
What’s your classic cars value? The Hagerty classic car valuation tool® is designed to help you learn how to value your classic car and assess the current state of the classic car market. We also offer classic motorcycle values and classic truck values.www.hagerty.com
It has been to the shop. It's ready to drive. SmileKeep in mind--Hagerty's prices are for insurance purposes, so they tend to be a bit on the high side. I like to use them, but temper them with a scan of completed sales on eBay and Bring a Trailer.
Also, remember, if it has been in storage for decades, it's probably not really sound mechanically. It will need some work to get it roadworthy.