The guy hasn't been to co-operative. The snake is on the mend. Took him to see Clayton Knight (Brisbanes top reptile vet). He was riddled with Flagelates. He was administered some Flagyl orally. I have to try him on a pinkie on Monday, and then give him his second dose of Flagyl in a fortnight. I saw him drinking this afternoon too.
As for old mate who sold it too me, I have photos + vet report. If he doesn't follow this and Farkurnell's deals up, I'll take it to Small Claims.