Upload & Sell: Off
I get a lot of this request.
First, I would explain and try to make them understand that this is an investment on their special day.
Second, if they are on a budget then I would work the right amount of hours to cover the basic and to create a story for the day. So hourly rate works a lot on my case.
Third, just let them go, do not under sell yourself because then they will tell their friends to do the same to get you at a low cost. And they will come back to you say sorry I did not hire you, there was another that did it for $500, but then they were not happy with the final work from the other photographer after the wedding.
So keyword here "It is an investment"