Knowledge can be the result of long-term experience or dedication to the accumulation of a specific area. There are collectors who build collections by themselves, who study and assimilate information. But there are precious few collections which are not built on a strong base of information. This is why collecting tends to follow the publication of knowledge in one form or other. In the past, it was books, now it may be the Internet.
Price is no object.
This kind of collecting requires no knowledge, just money. It's not collecting, it's shopping. It also tends to be self-limiting, because there are not many collectors who will sell under those conditions and the buyer soon burns out. They usually pay too much, get less than they paid for, and go away after a short burst or when they figure out they are the laughing stock of the hobby. Part of the fun of any collecting is figuring out what is rare and what is not.