I sell on codecanyon as well though only make around $300 a month right now. I have almost the same number of items as you do yet can't seem to get the visibility. Do you have any tips you can share?
Also, completely agree about the semi-passive! Lots of questions to deal with daily.
In my experience quality sells. Quality code. Quality feature set. And most importantly, quality design. I think a lot of items on codecanyon neglect the design aspect and therefore don't sell as much as they could.
Also, I've been somewhat lucky in that almost all of my items have been featured. This probably has something to due with how much time I spend on design - at least 40% of my total development time is design. Feel free to email me with a link to your portfolio if you want some specific pointers...
Also, completely agree about the semi-passive! Lots of questions to deal with daily.