I'm always looking to add to my collection if you have a list you can post somewhere (or pvt msg me here with it). The more technical or advanced, the better, for me.
Another alternative I use a lot...I used to sell used/antique/vintage books. The ones that were worthless to me or my business, I'd donate them to "Friends of the Library", and they'd sell them in their semi-annual book sale to help raise funds for the library. Just a thought.