Insurance value of contents - in storage

[PuzzledObserver]

I have absolutely no idea what it would cost to replace our contents - but we do have an awful lot of books and CD's. The value would be there more than in the furniture and electronics.

Our existing contents policy covers up to £75K. Our stuff is going into storage for three weeks while we move, and the remover wants us to declare the value for their insurance. Any suggestions how on earth we go about it... without creating an inventory and looking up a replacement value of every single item (not gonna happen)?

I just guesstimate.
But unless your books are rare I don't thibknyhrh are worth much, and your CDs. If your furniture is run of the mill then ditto.
I think I've valued the contents of my large four bed at £50k, but no way is my removable stuff worth anything like that, but to replace the kitchen etc it would be.