I just had my roof replaced, so it's fresh in my mind, and I'll provide info from a customer perspective, in case that helps.
It was a major cost project for me, so I had a lot of learning to do first on it to know what I wanted.
I don't know what the potential for 'upgrade pricing' is in any of these things, but I'm sure I paid more in various ways.
I wanted open valleys, the salesman was recommending closed California cut closed valleys. Glad I stuck with the open valleys.
I wanted the ridge vents, the salesman was recommending mountain ridge (Certainteed) for the ridges. but not ridge vents. Glad I went with the ridge vents, which I think added a bit more labor, and a bit more materials for the 'venting' material, which seems like it was then just put under the mountain ridge shingles(?).
The standard seems to be to paint all the vents/flashings to match the roof color to try to hide them.
I don't think the standard works - it's still easy to see them, and they're still ugly.
So I wanted to try to make them look better, and while the roofer didn't think it was the best idea, they would do it
So I got these for some of the roof vents/flashings from Lifetimetools dot com - and I wish there were more options similar for the other types of roof vents.
I wanted drip edge vents, since I don't have soffits - They talked me out of that. I'm not sure yet if I should have stuck to it on that one. Neither of the salespeople I talked to had heard of them. One was a 1099, one was not.
Another suggestion... if you're working with a 1099 salesperson, make sure all things get into the final docs before it happens. I changed colors with the 1099 salesperson, and it never made it into the final docs. But I'm actually glad it didn't - I like my new roof with the original color I had selected while the salesguy was there. Changes many other things, but none of them definite beforehand anyway.
He's my final roof, and am glad I had them replace all fascia boards in the process...
Now I just need to fix the rest of the house to match how good the roof looks
In the end, what I wanted more from the salespeople, was more to educate me on the options available, the pros and cons of those options, alternative things that could be worthwhile to consider.
Would have liked 3 of these to be used - http://www.dryflekt.com/
But that's a pretty minor thing in the end, and I can probably get the rain gutter guy to add those when that project is done.
How to find that salesperson that does all these things? I don't have a clue.
But as a customer, that's really what I wanted.
A new roof is too big of an investment to not get it done good.
And a bad salesman that is just there to 'take down the order for a new job' doesn't cut it for me.
In defense of the salesman here - I was also looking to do solar, so they sent a guy that knew that side really well.
Cost was too much, so I didn't do solar, and I think because of that he lost interest as a 1099 salesman.
I'm coming up on my 54th b-day, and I think this roof will last me another 30 years, so I think I'm probably good until death do us part...