Um, whoever says that cocaine is more expensive than MDMA obviously doesn't know prices very well. A gram of pure MDMA is approx. the amount used to produce 10 hits of X. Unless you're getting your rolls for less than $3 a peice (street value is $20 a pop and $10 wholesale), I'd say a gram of MDMA is a bit more expensive than a gram of cocaine.
And as far as no pills being found with coke? That's pretty funny because I got busted with 10 pills back when I used to go to raves (luckily I was still a minor), and after the report came back from the crime lab I found that they were approx. 10% cocaine. And these were pressed, white colored pills but I don't remember the imprint since it was over 8 years ago. Anyways, there can be anything in those pills which is why I don't mess with them anymore. But if you do mess with them, be sure and avoid the ones with brown or black spots since they usually contain some amount of herion. And just so you know, pretty much every pressed X pill you come accross will have at least trace amounts of something else in it whether it be mescaline, amphetamines, caffine, ephedrine or whatever else. The point you never know what you're taking, so think twice before you stick random pills down your throat.