As a designer and artist, having the proper resources to get things made is very important to me. The problem for me was when I needed to get something made, no one knew where to direct me resulting in my long quests on the internets to find what I needed.
I hate buying pre-made stamps. They're limiting to what you can do and more often than not, I really don't have the time to cut and carve my own linoleum. Rubberstampchamp is the site I found a long time ago to fill my custom stamp needs. I've returned to this sight to purchase several stamps and they have yet to fail me.
If you know what you're doing with setting up your files, this is definitely the place to go. Happy Stamping!