Shopping can become an addiction, but collecting itself is not. For the true collector, a collection serves as a form of self-expression. Hoarders, on the other hand, often feel a compulsive need to acquire as many items as possible within their budget to boost their self-esteem.
For serious collectors, a collection should evolve with personal taste, which requires knowledge to develop. That’s why the first piece of advice you’ll hear is to invest in books. This principle applies to various fields, whether it’s swords, ukiyo-e, ceramics, or others.
Some collectors might purchase ten tsuba for $1,000, while others might choose to buy only one for the same amount or even much much more. It all comes down to personal taste, as long as you understand what you’re buying and why. Self-education is very important to distinguish between a $1,000 tsuba and a $100 one.
There are also individuals who don’t feel a need to collect items but instead focus on research and knowledge. For example, Markus Sesko(who is a very big deal) owns only one tsuba, which was gifted to him.
Hope this helps! I wrote this with "swords" in mind, but the same principles apply to tsuba collecting as well.