I really envy those guys that have all those vintage Vipers, CGs, and Snow Serpents.
I can't imagine how much cash they laid out to get them. 
All I can say is it takes a lot of cash to rebuild a GI Joe collection. Then it's impossible to stop army building and expanding the collection beyond what I had as a child.
I really liked my Star Wars toys when I was a kid but in the end the 1982-1986 GI Joe toys I had were my favorites.
I stopped collecting GI Joe toys in 1986 when I was 11 and then sold them all in 1988. I did get back into toy collecting many different toy lines in late 1992 and that included the last couple of years of ARAH. In 1997 and 1998 I remember seeing the GI Joe repaints but for some reason I passed completely.
Between 2000 and 2004 I bought the new 2-packs and then GI Joe VS Cobra/Spy Troops/VVV but for some reason I still didn't pursue the old stuff.
My interest in the original 3 3/4" figures and toys was finally rekindled last year when I ran across the TRU Cobra Infantry set and comic 3-packs. That was the beginning of my recollection of 1982-1986 and everything else I didn't have as a kid. Then I bought most of the 1987-1991 toys and a few of the 1992-1998 things that I missed.
Earlier this year I took a break from the ARAH line but then I attended the GI Joe Convention in Minneapolis and I caught the army building and collecting bug big time.
Now, I'm in the process of setting up my GI Joe collection and enjoying all these cool toys.
Jim