Back in my heavy trading days on Beckett (which should tell anybody that's known me for a while how long ago that was ) I think I completed something like 45 online and offline trades in a single month. I stopped going trade crazy after that because it was consuming too much time, and to be honest, at 45 trades and collecting one player and a small handful of sets, I wasn't getting much PC stuff in return.
I'd wager around here, one of the these people have the record:
The most I have done on here is 32. Back when I first came onto this site (2008). I have toned it down a lot as most people now want the sky and than some for there cards.
If I had to bet I think 28matty28 has the most in one month on here
My trading goes in spurts. I have done 40-50 trades a month in the past on beckett a couple of times. 90% of them for cards on my wantlists. In the last 6 months though I have probably only done 30 in total. Think I'm sitting around 450 in total since they did the big switch.