FWIW, here's a little more perspective on the stats. These numbers are based on the current inventory and Nov-Dec sales:
Oil -- 57% of inventory, 57.5-62.4% of sales
Acrylic -- 18% of inventory, 24.7- 25.1% of sales
Pastel -- 4% of inventory, 2.7-3% of sales
So things sell more or less proportionately to what's offered, with pastel sales only slightly lower.
Here's a sadder one: currently only 1.4% of auctions have bids, and in any given month, 1% or less of the total inventory sells.