A little? 70-200 L glass prices (approximate, but you get the idea)
f/4: $550
f/4 IS: $1000
f/2.8: $1150
f/2.8 IS: $1600
I agree on the desirability of the faster and/or stabilized lenses, but sometimes the budget doesn't allow for it.
When I finally bought my 70-200 f2.8 I think I paid about $800 used but in "like new" condition off of eBay.
While I kept my original 70-200 f4, I saved up for a few months to get the faster glass and in the long run I am really glad I did.
