no one knows for sure..
my guesses
est. 1,000,000 T206 cards survive, or about 2,500 of each common pose.... sounds good to me
as far as sets, the Plank and Wagner limit it to about 60 sets possible, if you take out the big 4-5 then maybe 1,000 sets possible ... its all a guess though... they ARE the most common PreWar card in existence, but having roughly 520 in a set makes the set a little tougher because of size ($$ is the main factor though)
T3s are common, but some players are very tough. Because you could choose which player you wanted, the more popular the player the more common they are. Im sure there are 10-15+X more Cobbs and Mathewsons compared to one of the action poses or some of the less popular players.
cant guess on how many survive, many many thousands Im sure...
Old Judges are common if you are just looking for a "type" but some poses and players are almost unique, Im no where near an expert on the set, but do know some pull good $$, ie the PCL players and the Anson in uniform, and its because they are very rare.... a complete set w/ all poses is impossible IMO
Now the E105 Mello Mint is a funny one to bring up compared to the common cards above, they are fairly rare and in a completely different league, only a dozen or 2 of each player probably ....if that.