For me, it's a minor miracle that any audio gear retains the value you purchased it for, let alone actually continuing to increase in value. So, I don't look at purchasing audio gear as an investment and try and make comparisons with the increase in value vice what the same money would have done in the stock market. I do take some comfort in knowing that I will get all of my money back and possibly more down the road if I ever chose to sell a given piece of gear that is actually an appreciating asset, but I'm buying them to listen to.