Like Dubber has said, best bet is to put winter tyres on, however. Theses are the kind of wheels that would sell well to others for them to use as winter wheels. So don't think they are worthless.
When I was looking last year for a set of cheap alloys for winter, even the standard wheels were extortionate so I ended up giving up. Maybe leave it till October / November when folk have left it a bit late and are willing to pay slightly more for something half decent.