A long time. I'd dream about having one.
Here's a tutorial on creating your own custom rubber stamps!
Think of the endless possibilities!
Step 1: Supplies:
Speedball, Speedy-Carve Rubber sheets!
I got it on amazon, $15 a sheet that is 6 by 12 inches
(you can also use Pink Rubber erasers)
Hobby knife (xacto)
Pattern, pen...maybe scissors.