...That would take me a million years. Can't we just call an average MSRP of $20 a disc (sounds about right, accounting for the lower cost of collections and the fact that most of my DVDs were $30 msrp singles) and be done with it? =P
I considered adding a column to my spreadsheet at one point with original MSRP, but that would take a lot of research.
I'm sure your insurance company would be thrilled to pay you substantially less for your collection but the fact that you've still got to document it in some way combined with the size of your collection (which I assume is big given your concern about how long it would take) makes it sound substantial enough to warrant complete and accurate documentation.
I've got a decent sized collection and I've look at various methods of tracking beyond the basics I currently use. Check out the
Tracking Your Collection thread for some very simple but powerful software packages for doing this. I've also looked into USB barcode scanners and decent ones can be had for $50. Combined cost of software and scanner puts you right around $75 for a setup that will shrink a weekend long project into an hour or so. If saving that much time doesn't already pay for itself then consider that if something happens to your collection then having cataloged just 8 titles at $30 MSRP instead of $20 will pay for both the scanner and software...and I'm sure you have far more than 8 titles.
Just something to consider but the numbers are definitely in your favor.