To date, the most I've spent on a knife was $189 for a ZT 0801. I wasn't familiar with that model, saw it at a gun show (knowing I was probably overpaying) and bought it on the spot. Will I ever use it? Probably not, less because of what I paid for it than because I want it to remain in essentially the exact condition as when it first caught my eye. I feel the same about a Kershaw Groove that I bought a couple years back, although I did buy a second one to EDC . . . very infrequently. Same with a few other Kershaws I own (RAM, Mini Cyclone, Storm,) as well as a Benchmade 300SN, SOG Mini Vulcan and Spyderco Ulize that I bought simply because I loved the design. The same premise applies to those and numerous others as to the ZT. Ordering a custom currently doesn't hold much appeal to me, as I don't think it would be a very educated purchase with my limited knowledge of knives overall. I don't have a "dream knife" just yet.
Whether or not I'll crack the $200 mark at some point remains to be seen, but it would probably not be for a user, as I just don't do the types of things that call for an expensive knife. My typical EDC knives all came in under $40, and with the exception of the Benchmade Adamas 275 I just bought on the Exchange, I don't think I own a $100+ knife that I'd feel compelled to carry during the zombie apocalypse. Most of my "serious" work has been done with ho-hum blades made of 440A, 420HC and AUS8.