from my experiance with paintwork if it sounds cheep, it will be sh*t
there are differnet types of paints also, you can get a solid colour, so that it doesnt need laquer or a base coat then laquer, cheep backstreet people will just use a solid colour and the colour will fade and change over time and also looks half arsed
my advice, if ur geting it done then pay the money .
also one other thing make sure the place you take it has colour chips so they can match the colour correctly. lots of independants dont have them and just use the paint code and hope.
hope i helped.