If it brings me pleasure it is something I need, as I need to enjoy my life. On something like this I would just think about whether the cost justifies the amount of pleasure it would bring me. If I know I would get tired of it after a few weeks, I’m not going to blow thousands on it. If it’s a major enhancement of a hobby I’ve had for a long time which deepens my ability to enjoy it and I’m not risking anything else by spending the money, then it’s a decent investment in my happiness.