I think there are numerous (1000+) "Stamp Rooms" in the US valued at $25,000 or more. I was recently speaking with the owner of a large
ebay consignment operation. He said they have a minimum $35K requirement for consignments and they are overwhelmed with consignments.
On the other hand there are very few Scott 1840-1940 collections that would sell intact at auction for $25,000, in fact the Noblespirit collection is the only 1 I've seen. On the other hand a Volume I collection that sells for $10-15K at auction usually exceeds $25K when broken up and sold by country.