there's not really much I can add, it's been covered quite well. Pure locality hog isle average $250-350ish. They are great boas but all boas are pretty great IMO. My regular boas 'hot spots' are in the mid to high 80s, I keep my hog isles slightly cooler at 85ish hot spot.
There are no hog isle morphs unless they have been crossed with another locality of Bi. Hog Isle have their own natural hypo-type variations and normally have obvious light/dark phases. Photo below is my adult male, he's a very classic 'wild type' with lots of speckles. I really need to get some new photos of both of them especially the female. My female is more of a 'natural hypo', her baby photo is below the male (she's an adult now). My male was from Gus at Rio Bravo (no longer i business) and my female is from Chad Duggin.
They can get larger than this. I feed mine f/t medium rats or small f/t rabbits.
just fyi - it has happened before with a large Bi but not a common thing at all:
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