BMW type 243 17" wheels and Michelin tyres

I bought these wheels 4 years ago for my 3 series.
I had them fully refurbed to gun metal by The Wheel Specialist in Nottingham and had winter tyres (Michelin Alpin 5) fitted.
Have only used them once, only a couple of hundred miles on the tyres, like new.
As they have been in storage a couple of small oxidisation marks are showing, one on the rear of the one of the rims and three of the others around the valves.
I am asking £700 for these, buyer collects or I could meet part way depending on distance.