I honestly don't think Busse's are above in price compared to other customs out there. I'm talking about Fehrman's and Maddog's.
I wouldn't consider Simonich's, Gerbers, CRKT's, TOPs, Entrek's, etc. in the same category or standard.
Not to drop names but that's just my opinion and 2 cents.
if you go into the makers sales section of bladeforums, there are a lot of custom makers that sell knives ranging from 150-400$, wich is for the most part below the general market price of any given busse right now.
ferman is more of a small run production outfit, though he probably does do some custom work. and I'm not sure mad dog actually takes custom orders. Simonich, Gerber, CRKT, TOPs, and Entrek are all pure production shops right now. I think that simonich and entrek are kind of like busse, in that they have a small section of their bussiness that can and will do custom orders, but their bread and butter are standard production models.
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all have custom work thats up that is under the 500$ mark. all of it excellent stuff, just different then what you'll find at busse. some of it has features that busse doesn't normally use in their production knives, unless you custom order it (wich you can do), such as true choiless, and classic hidden tang bowies.
so, for collecting purposes, the custom maker market gives you much more variety. for use, the custom market gives you a range of items that busse either wont produce (steels, super super thin), or doesn't produce (classic designs). though again, you could totally get a custom knife from the busse custom shop for a 6" bladed knife for less then 800$.