You can get a new door and frame installed for about the same cost.
I know cost of living differs, but I find it hard to believe you can get someone to buy and hang a door for $500. Gut check for me would be at least $1000, probably closer to $2k. Maybe 20 years ago you could get that for $500
That’s what I assumed was going to happen and is probably what I’d try to do on my own. Caulk and paint is easily done. PVC will last forever
$675 seems steep for that, but for them there’s also some opportunity cost – if they weren’t doing your job, they could be doing a different job for more money. So instead of saying no outright, they price it up to make it more worth their time.
Yeah, that sounds much more like what I would have guessed.