Lets share some of those “secrets”:
Oraface Anus has 26,541,395 SP. You cant extract below 5m SP and you always need to extract 500k SP, so you can extract 43 times.
43 Extractors are 14,6b if you just buy them from Sell orders in Jita (http://evepraisal.com/a/qg0i8)
You then extract 43 times. Its some clicking, but whatever.
Congrats, you now got 43 large skill injectors, worth 30,7b if you just drop them to buy orders (3% tax included)
So you just made 30,7b - 14,6b = 16,1b ISK.
This is the least efficient way possible and he would still make 1b more ISK than your offer AND save 20 bucks. So please stop lowballing that bad and trying to defend it with “trading secrets”