A compilation of the “BIS” gear from most patches, I haven’t gone over all of it (or even one whole class) and compared every possible item to see, but it should give you a general Idea of what to expect/look for.
https://docs.google.com/spreadsheets/d/10IV_3NEmZdhh8iQXrs2Ek77YyUJbjBMWO5UxIWLlZl0/edit#gid=1738440837

https://forum.nostalrius.org/viewtopic.php?f=6&t=16607 (thanks Triggerlilly)

This topic shows all of the stat changes done to tier gear over the different patches. Can probably find stats for other items as well.