I'm thinking about attending the DC show and was wondering what to expect. Are there good deals to be had? Ideally, I would like every pen there to be 95% off of MSRP. Are they fun in general even if one doesn't have a lot of cash to spend?

Go to http://www.richardspens.com/ and look at the Reference Info Section
That should tell you pretty much all you need.
I'd bet you'd find it fun, even if only just to do some 'networking', try some pens you've only read about, and pick the brains of the experts.
DC show is, I believe the largest.

richardspens.com
reference info
penshows

Ah, wonderful. Thank you.

I've heard from friends who have attended that the Washington, D.C. show is HUGE so be prepared to be dazzled! (and dazed)