I agree, 100%!
Even if you shell out $1000 + for a REALLY nice digital, it will be worth it in more ways than one. Maybe not for some dude trying to sell a clutch of corns but if you have a web page or anticipate an decent yearly batch of snakes to sell, it's worth the cost.
Like Will says, a lot of people want to see pics or even multiple pics of animals they are considering buying. The digital camera allows you to take those pics AND have them be seen by the prospective buyer within minutes. That's a pretty awesome tool.
Then there are all of the "personal uses"...