The values have changed, since I wrote my Excel spreadsheet.
I was doing Arbitrage... buying anything below "x" value, DEing it, and selling the mats.

It got insanely boring, even with Panda DE, which is click your mouse anywhere in a window.
And auto DE a green, and nothing higher, only items in bags.
While watching TV/DvD mostly.
I doubt another toon will ever get over 20,000 items DE'd.
But was a decent gold maker, for sure.

Anyway. The current DE chances, if anyone is interested:
http://www.wowwiki.com/Disenchanting_tables