maybe he was an old school dealer who just did it to get his own smoke and make enough money back to buy the next oz and do the same so on and so on, keeping his head down not bothered about the money or making himself blazing to the police.
if so we need more people like him!
i had a guy about 5-6 years ago who grew fat, stinky, stick, shiney WW buds, he use to do halfs for £60, oz's for £120 but after you bought off him for a couple of months he would do them for £100, but i lost contact with my contact to him