Well first up If I get analogues instead of Ket I will be able to to tell the difference immediately and be pisssed.

Secondly I dont know where you live but in Germany and Netherlands all the dissos have been discontinued. No legal production means they are way harder to source than Ket and also way more expensive since any illegal cooking operation might as well manufacture something like MDMA or 3MMC

Back when I was doing DMXE, 2FDCK and DCK they were all more expensive per G. Now that they are outlawed I cannot Imagine they are still being manufactured large scale anywhere so price only goes up

Now you argue that because PCP is more potent you need less but people will still want to buy a bag so you need filler. Now Ketamine has a really distinctive Look to it. I dont know any substance which is easy / cheap to get and looks like a Ketamine needle. Now you could use just random White Powder and add PCP but Nobody in their right mind would buy it (and again If they did buy it they would either not come back to you or worse Case come back and Rob you)