I wash as well as bank (freeze) yeast. I have around 7 varieties frozen which are good for years and probably around 6 different strains that I use regularly washed. I don't remember the last time I bought new yeast. It's easy to do and I don't know why more people don't do it. When you wash/store your own yeast and buy grain in bulk, AG brewing in large batches (10 gal) is a whole lot cheaper.
"Look, let me explain something to you. I'm not Mr. Lebowski. You're Mr. Lebowski. I'm the Dude. So that's what you call me. That or His Dudeness... Duder... or El Duderino, if, you know, you're not into the whole brevity thing." -The Dude