how longs a piece of string springs to mind whenever someone asks how much a respray is
i'll make it a little easier to understand, there are a number of things that can change a quote, prices from north to south of country vary, going to a big insurance approved bodyshop or a small backstreet bodyshop, what colour the car is in the first place, what colour the car is going, if there is any damage ie rust/dents/accident damage, if any body mods are to be carried out, wether the whole interior and engine bay are being painted or just door shuts/back of doors etc, wether all parts are going to be removed and painted or painted on the car, if its just a straight solid/clear over base colour or a special pearl/candy
also taking it to a big insurance approved bodyshop might get it done quicker than a small bodyshop but from my experience the smaller bodyshops will take more care and pride over the job wereas big bodyshop will just want it in and out and done to get the next car in as quick as possible which can lead to poor workmanship/quality