Let's be honest, it's unlikely the option of gifting or selling items between members is ever going to happen due to the financial aspect.
However, my equipment list is untidy when it's full of all this unwanted equipment, so why not introduce another category to the bag named "Shed" or "Garage" where all the unwanted personal equipment can be stockpiled and left to deteriorate just like real life.
At least it won't then be cluttering up the menu when I'm selecting what I do want to play.
It also gives you the opportunity to bring a putter out of retirement when you start a bad case of the yips.