Hold on to old tech or sell it?

Hey guys, so it appears as if I have loads and loads of old motherboards, consoles, desktop PCs and even a few laptops in my garage. Looking at the way tech is going, will anyone look to the past in years to come? Or am I just holding on to junk :/ Would like to clear space in my garage but finding it hard to get rid of these things for sentimental reasons 😀