I can give you some perspective on Ben's prices - because "quality can't be that big a difference, can it?" doesn't really cover it
pretty much everything Ben sells is premium - either top end examples of more common woods, or rare and very hard to find woods. The stabilizing is done by the best in the business. I've never found a "defect" while shaping a handle - which commonly happens with eBay/Instagram pieces, which then means you are out the entire amount of your purchase.
Really premium wood DOES enhance your knife's value, assuming your craftsmanship matches....if you put a piece of $200 Rosewood on a 50 dollar knife, it's not going to be worth $250
Further, Ben runs "sales" every so often, and you can pick up more "quantity" thru those. Ben can also help you with how to finish pretty much any type of wood if you need the help.
I will say that Arizona Ironwood is also an excellent supplier, and probably a bit better on price for DI than Ben, because that's pretty much all they do.
one last thing - remember that buying a large piece to cut into scales/blocks always involves 1) waste 2) time 3) risk of discovering defects in the wood and most importantly.....maximum # pieces per board = suboptimal quality per piece. With highly figured wood, cutting to enhance the flow of the figure yields significantly fewer pieces but ones that look killer on a great knife
thoughts from a Koa whore...
Bill