No, not the rock band; the philsophy. Keep It Simple, Silly. Well, that second S varies, depending who you ask, but we’ll leave it at that.
We know you live in your house. Prospective buyers know you live in your house. Well, really, deep in their subconscious, prospective buyers try to envision themselves living in your house. Having as few personal effects visible as possible makes it a whole lot easier for them to do so.
With this in mind, pack up and store all but the most prized nick-nacks. Then, go back and pack up half of what you left out. If it’s something you’re likely to use before you move, or packing it away would leave a wall or display case completely bare, by all means, leave it. But, if it’s not in a display case or it’s not the last thing hanging on that wall, pack it and get it out of the house. Storage units aren’t that expensive and many are climate controlled and feature gated access and on-site security.
You’ve just made your house a whole lot more inviting to buyers and, as a wonderful side-effect, protected your most treasured posessions from damage or theft.