how longs a piece of string is pretty much the exact same question
prices of resprays vary so much due to alot of factors, for example:
what colour the car is and what colour its going,
any damage, ie. dents/rust/accident damage to repair,
any body mods to be carried out,
whether its just the outside being done, or the door shuts too or the insides or the whole shell,
how much of the car you want stripping down ie. windows out, doors off or not,
prices vary alot depending on place in the country,
prices vary from small bodyshops to large insurance approved bodyshops,
what colour/type of paint it is going ie metallic/solid/pearl etc
only way you will get proper ideas of prices is by going and visiting local bodyshops, tell them exactly what you want doing and they will tell you the price