I travel a lot for work and you would not believe some of the things being destroyed because they either don't care or don't have resources to preserve them, just a few recent pickups include:

• a First edition UK printing of the crying of lot 49 -A first edition of ritual by pinner -A first UK edition of Jules Verne's the Danube pilot -A limited of 1000 (mine is 799) edition of great expectations printed in 1880

It's absolutely heartbreaking to see how these books are treated if you don't get to them in time.

Also thanks, I generally leave them on also but I've been curious recently. Maybe I can have a professional in restoration do it so I don't screw it up.