I paid £40 for my 15inch alloys( for all 4 ), admittedly the tyres are shot but I wanted these particular wheels ( Ford Puma "prop style" ) as i think they cover the weedy discs & drums nicely
I,ll be buying 4 new tyres for £125 & have a friendly local tyre place that will fit them for me
Tho it depends on your budget etc but Halfords have some good deals on wheels/tyres combinations for around £300
cheers
andy