I find this is best done after the fact in the invoice rather than including in the initial estimate. This way you can adjust the number to suit them later on. Usually clients don't want to think about how many copies of the video they want when they haven't seen it yet, but some are exceptions. Obviously making sure you make them aware of your price for extra DVD copies, digital uploads, etc., ahead of time in a proposal outlining the costs. I usually include 1 or 2 DVD copies free of charge and have a flat fee per each extra DVD (depending on order size, with price breaks at certain number points, eg. 100, 500 DVD's).
My advice to you is don't sell yourself short, but don't scam people. Give them what they pay for. Not able to make work worth 800$? Then you may not be ready for it yet. That's ok though- it all comes with time. If you are able to do it, then I'd say between that and 1200, like Eheath said, is a good starting point. Charge a per-hour rate for filming and maybe a per-hour rate for editing (usually lower as it's less intensive and less pressure) but you will have far more editing hours than you will filming.
Pardon my french, but make sure you get your shit together ahead of time too. Extensive camera/equipment checks, PLENTY of cards, batteries, backups for backups, know who to talk to if there's any issues and make sure you dress to the code.
Best of luck and let us know how things turn out