ouch, that seems a bit high though i haven't gotten any quotes on painting my '66.
i'm going to shoot it myself, probably use rustoleum from home depot. used it on a '73 i have. had to touch up the upper half of a two tone that had some light surface rust from paint deterioration from sun damage ( take that rust belters ). they even matched up a shade of baby blue. quart of paint: $10.
i was pricing out paint at a large paint store out in mesa, they're asking $500 a gallon for red? i'll pass.
i had a great experience with 'exclusive paint & body' out in tempe, (480) 968-4223. a neighbor's guest backed out of her driveway and into my '64 corvair so she paid.
she pretty much toasted the rear door ( i thought they'd have to replace ). plus i sprayed the corvair about five years ago with a metallic green that i'd had stored for around 20 years so i thought they'd have problems doing a color match.
dropped it off monday morning, they called wednesday saying it was done. i couldn't tell that it had ever been damaged, the fit and finish was perfect. door gap matches and it still closes with that solid 'thunk'.
good luck