I started collecting/playing around tempest and tried to complete sets only recently.
I miss maybe 5 cards in the Urza block
less than that from the masque block
but quite a few from Invasion (my budget is short now !)
I think I will have a complete set of stronghold and tempest, maybe even exodus but I need to get my cards from home first ...
I am slowly making my way backward to former sets, with quite a lot of weatherlight, vision and mirage ...
I sont think I will be able to go further than that unless I buy someone's collection ...