I don't know the exact dates. I'm certainly not any big time collector (aka a 'real' collector...sorry that's an inside joke
), but I can give you some anecdotal info from my bound book:
My first Alby with a Tennessee Guns stamp came in from AIM surplus on 11/8/2002. I don't recall how long they had been for sale before I finally pulled the trigger, but it couldn't have been that long...maybe they came in at the beginning of that year? It's an all matching gun in decent enough condition.
My second TG Alby came from AIM surplus as well on 10/7/03. These were the fire sale guns they had. Most of the albys that came in had condition issues (as I'm sure you well know) and they really weren't moving well. $79.99 with free shipping to my door. It's not much of a gun (fair condition and mismatching with a Russian trigger group), but it's one of my top three absolute favorite SKSs. I use it as my 'ranch gun'. I wish I had bought 10 of them at that price.
Here's an AIM flier I've got from Fall 2002:
Hope that helps.