I got a set of 16" VW alloys from a breakers for £120. And 16" tyres are cheaper to buy. They look crap, but it's winter, so I don't care.
Remember you need 4 winter tyres for emergencies. A car with 2 winter tyres nearly hit me last year. He breaked on a corner and the rear of his car swung onto myside of the road.
Do not listen to people who say you only need 2 (that's what my tyre fitter said to me - I looked at him like he had 2 heads
). You only need 2 to get you going. But you need 4 to get you stopped safely in an emergency. Don't mistake traction for grip. Traction on the 2 front tyres will get you going. You need grip on all 4 tyres to get you stopped safely in an emergency. Do your own research.