cool topic! Did you know that when items where transfered from rs1 to rs2 it was posible to get more than 1 scyth or bunny ears in your bank? Some ppl who kept them still have more than 1 scyth or bunny ears. I still have 6 scythes atm ;-)
my gues is about 200 on active accounts for inactive acounds its really hard to say, but it doustn't really mather becouse most of them wont ever login again.