if you find you are in the market for some of his (and many others' material), I likely have it and would consider selling.
The only Dr. Dave DVD set I do not have is VEPS (Video Encyclopedia of Pool Shots)
Here are the Dr. Dave products I do own and the prices his site currently lists them at:
DVDs:
VEPP (Video Encyclopedia of Pool Practice) - $134.95
VEEB (Video Encyclopedia of Eight Ball) - $134.95
VENT (Video Encyclopedia of Nine-ball and Ten-ball) - $134.95
HAPS (How to Aim Pool Shots) - $ 84.95
SAWS (System for Aiming With Sidespin) - $ 29.95
BU - (Billiard University) - $ 84.95
The Illustrated Principles of Pool and Billiards - $24.95
High-Speed Video - $18.95
Books:
The Illustrated Principles of Pool & Billiards - $14.95
CD-ROM:
Tom Ross Complete Instructional Works - $39.95 (2-discs)
He does discount for multiple purchases, but I wasn't going that far in my research.