To the OP's question first you have to ask yourself how long is a piece of string. Well, it is from end to the other. Not to be hateful here but it really is that simple. I want a car; how much do I have to spend, how fast do I want to go, how much luxury do I want, do I care about pride of ownership, blah, blah, blah. I want a stag knife; do I want popcorn, what about color, do I want it 2" thick at one end and 1/2" at the other or appropriately fitted, how about texture
How about ivory; well now that could get interesting.
Buying production knives with natural handle materials is going to be a crap shoot. Always has been to some degree really. Some will always be nicer than others. Some won't even be acceptable. If you really want your moneys worth with natural handle materials work with a custom maker. Not to say you won't get disappointed here as well but they are your best chance at bang for the buck. If you don't want the extra cost or wait time stick with synthetics, bone or wood. Disappointments won't be as big or costly.