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as I said, prices have shot up recently.
Restoring them is a PITA, and I don't know how much more value it will add to the stove. Personally I would wipe all the surface dirt/rust off, try to fire each one up, write a detailed description for each stove, and sell them individually. eBay prices are pretty universal, but go up a bit in summer. They've got to be emptied of paraffin and flushed out when you post them, otherwise the sorting office people get quite angry.
https://www.ebay.co.uk/itm/166636653875