WWW.eqtraders.com The site for ts info. (plus 1 to post count.)
To answer your other question, yes the players themselves had to play around and find more of the recipes, then share them with the community. Various ts books can be found in areas in each expansion. See gunthak light house, the cities, and some zones.
Edited, Oct 9th 2012 11:15pm by Jonwin
For Truth, Justice, and the Norrathian Way!
Tinkering is a trade skill which will not prevent the mobs from hitting you.