Without getting into the inbreeding question, as a potential customer, any good breeder will be more then happy to discuss everything related to ball pythons before, during and after the show.

As a frequent vendor at the PCPC show, I can honestly tell you this show is always very busy, breeders don't always have the quality time necessary to discuss in depth with every customer at this particular show. You should get to know all the breeders prior to the show, establish somekind of relationship before showing up in front of their table.

Many good breeders lack customer service and this I believe should be your main criteria before deciding where to spend your hard earned coins.

A good breeder will always be there for you after sale, not the case with many of them there, you will have a good dozen breeders there of which 5 or 6 I would consider top notch.

how does one ask about the level of line-breeding/in-breeding in that snakes bloodline?
Good question, you should first ask witch lineage this and that particular morphs is from, they should all know that and if they don't, I'd walk away

Would even asking about this be considered offensive to a breeder? Would they look at me strangely for even asking?
Not at all, good breeders don't have anything to hide and If they go as far has looking at you strangely, again walk away

(And yes, I’ve considered just ‘not asking’ but I’m afraid I have to touch the stove to know it’s hot.)
You absolutely need to ask anything you want, most breeders are very passionate about their animals and just love to talk shop, don't be shy, ask away

As for other questions to ask, here are a few more;

- Is it feeding on rats, live or frozen thawed. Does he guarantee a good feeder ( this cannot be overlooked as too many start them off on mice )

- What substrate is the snake kept on

- What is the guarantee on this snake

- Did he produce the snake or from a thrid party

- Trick questions for the breeder, which other breeder would he recommend? Pay real attention to his anwser

- Any pics of the parents?

- Is there a number he can be reached for more info, an e-mail addy is not enough!

Also, don't rely strickly on reputation, can be reputable with lousy customer service...

Good luck

Marc