Double bass is a big beast and a sustainable investment. I have changed several instruments. Probably, I could even make money on the sale if I had such a goal. I am content that I have not lost anything. The market is small but stable. When I buy DB I don't think much about liquidity as I know I can always sell it if I want an upgrade. Now I am faced with a difficult choice. I want to buy a bass at a high price and I'm pretty sure it won't sell easily. It will definitely be a loss of money if I want to sell it. It is a small fractional size, laminate and not expressive sound. It costs four times as much as similar Chinese student bass and twice as much as I bargained for. But this is what I want. As always, I am sure that I will never have to sell it, as I thought about all the previous double basses. But when I bought and sold the previous basses, I was a lonely and young man. Now I have a wife, kids, middle age, and a lot of things to consider before spending any money. I am wondering if the loss of value factor is important to any of you? p.s. Yes, my two carved full-sized basses will stay with me (if anyone is worried about my practice).