Speaking of "cash," and "high end guns," and "collectors," when I lived in Los Angeles and attended the big L.A. gun shows -- before the communist politicians virtually destroyed California's good gun shows -- I knew two collectors who were always looking for very high end guns.
Both of these guys carried $75,000.00 cash with them, and told me that they knew several other collectors there who did the same. All hundreds. I saw one of them buy a very elaborate, beautifully engraved with gold inlays, cased, Holland & Holland double rifle with two sets of different caliber barrels, H&H tools and accessories, etc. for $45,000.00 cash.
Years ago, it was not at all unusual to see the very high end guns such as that at the L.A. show.
The most high end rifle on a table I've seen here in Boise at a gun show was $28,000.00. Don't know if the man sold it or not. Saw an absolutely pristine Colt's Single Action Frontier .44-40 still in the original box with Colt's letter, 1881 mfg., for $12,500.00. Colt's letter stated that revolver had been shipped directly to a Deputy U.S. Marshal in Colorado. The dealer had got it from the man's great great granddaughter. Story was the Deputy Marshall didn't carry it but put it away. The dealer would not "deal" on it at all. A couple hours afterward, I walked by the table and it was gone.
There is a custom gunmaker here who occasionally has a table. His "el cheapo, starter" rifles start at $20,000.00. He has a waiting list.
As said above, "Cash is King" at a gun show.
Have fun.
L.W.