Certain CS Books Appreciate in value...

  • Article

Just last month I sold of my old CS books for more than what I purchase for.
I bought all 3 in 1994 for about ~$25 each. I sold them for ~$37 each.
I gained ~50% and make extra room in my bookshelf.

How weird? I thought only house appreciate in value.

If you are curious, the titles are as follow:
1. TCP/IP Illustrated Volume 1
2. TCP/IP Illustrated Volume 2
3. TCP/IP Illustrated Volume 3