Thank you!

hell yeah love special rooms and am also often confound as to how exactly to implement them

It's amazing. I love the hacky cartoons in the AD&D books.

I can't wait to get into this

Exactlyyy...which is why I wouldn't put it past them to kill the pegasi & sell their eggs if they really need cash. Sometimes you dangle the Evil hook in front of them & just see what they do.

But I agree that most players probably won't have the stomach for this sort of thing. Me, on the other hand - if I'm playing an Evil character, I'm going beaver hunting. :)

(Obviously a Good ranger would come into conflict with an Evil assassin looking to sell beavers into slavery without the need for the rules to tell us so.)

If you follow the rules to the letter, paladins cannot associate with Evil characters at all, & will only do so with non-Evil Neutrals for a single expedition (this precludes thieves, assassins, & even druids). Interestingly, rangers have no such restrictions, even though they must be Good.

For every Good paladin or ranger, however, there is more than likely a Neutral or Evil thief or assassin. I can't imagine that (Neutral) druids would partake.

Oh yes, definitely. I think this is the behavior of solely Evil (& probably some Neutral) PCs. If a Good character wanted to sell baby giant beavers into slavery I would have to sit them down for a chat first lol.

...but I can't imagine why the Monster Manual would list the exact gold piece value of various monsters' children & eggs unless it was assumed that the player characters might occasionally take an interest in selling them.

I don't think there's anything in the rulebooks to suggest that PCs are or should be "generally" good or neutral in AD&D. It is definitely an assumption of the play culture nowadays (I can't speak to the play culture of the time)...

All those scattered "Monster Parts" throughout the MM definitely informed our games. Inspired me to whip up some tables on the topic as well:
blog.d4caltrops.com/2022/03/d100... and blog.d4caltrops.com/2022/03/d100...