I have a very soft spot for vintage books, especially ones with great subjects and covers. I have my own collection of books that I can't part with. (Recently added: Sam and the Firefly. I was about to list it, then I read it, and then I realized I couldn't let it go!!)
I'm beginning to get more into finding books that I think other people would like to have. From mathematics to oceans to stories about red-headed orphans (that are not Annie!), they are all ending up in my shop. Check it out! I think some of these books make great graduation gifts (Math book for a math major or a future math teacher?) or just great books to have in your own library. Enjoy - many more to come!