By pure numbers and age yes the e36 wins as others have said. But it's also now cheaper to get a clean e36 then a clean e30. E36s are hitting the age where they are starting to rust out, and there numbers will drop over the next 5 to 10 big time. As they rot you will see more e30 owners swapping in new motors and then the tables will turn.
The e30 will probley end up being around for a long long time as they are the last 3 series with a classic look. The e36 is a good looking car (I have both) but not sure if it will have as strong of a following as the e30 does in the long run.