Today someone mentioned asking for a Lewis and Short* for Christmas. That made me think to check abebooks.com and alibris.com to see if any were available and what the asking price was. abe had nothing. Alibris had a copy for $40.
This book normally sells upwards of $250. Used, you're lucky to find it at $150.
Naturally, I bought it on the spot. This sort of book is an invaluable tool, a career investment.
I own a Lewis and Short!
* The ultimate Latin dictionary, for those not familiar.