Stone me, if pay someone to get them refurbished you might be able to give them away Joking aside maybe £90 to £100 per wheel without a tyre.
Going by the fact they need a refurb and likely 4 tyres to replace the shit budgets, You will be lucky to get £450-£500 for them.
If you end up sourcing wheels separately, drop me a message in a couple of weeks as I've got a spare 18" Cup wheel that I'll be getting rid of.
They are stupidly rare I managed to sells Steevs, much prefer the 18's axl's Just need to get them refurbed in satin black as they are currently gloss black