We are always looking for greener grass. Sometimes you realize your mistake long after you sell something. All part of the learning experience.
Can you share examples.. Are your local dealers offering free trial periods -or- are you buying / paying for shipping components back and forth, in some cases dealers asking trial’ees to pay up to ~25% restocking fees for returns. Trials can be tricky, particularly for large and heavy items, amps, speakers.
What type of components are you referring to doing "trials" on?
It's rare to see anyone who is sure getting it right on the first try, particularly with speakers, amplifiers, and proper matching in a given room setting, new or used.
Many senior members here owned notably different gear 4-5 years ago. Curiosity makes it very difficult to stay put, sometimes. Best of luck to all on that effort :)