[KrisMcGrath]

Hi all,
Ok main story is that ive been offere a set of 4 17" bullet alloys 8 months old for £300.
The rear tyres are good as new but the front two are needing new tyres soon.
They have on them 205 x 45/R17 Dulop Runflats.
Does anyone know roughly how much these are?
Also if there too expensive would i be ok with putting non-runflats on the front?

Thanks for all advice, Kris