?700 your be lucky unless it is a friend!
With paint jobs the jobs varry loads, it depends on what sort of a job you want and how good the sprayer is.
Also a colour change doesn't make a different in price it is what parts you want painted. i.e. door shuts to match, under the bonnet etc....
There is a vw body shop I use down here, for a Rallye we had a full bare metla respray, new cells fitted etc.... and a colour change, so door shuts teh whole lot it cost ?2500

Then the same place did my Limited, they did the whole car, welded some bits (from old roof rails) sorted the few little bits and that was only ?1100
A lot of it is down to preperation, and the time it takes.
I have seen some bad jobs with runs etc all over the place so go by word of mouth.