I think it's rare to see audio gear appreciate in value. The LIO would have to be really special, and the owner would need to be young enough to wait the years required to see a significant gain. Thinking along the lines of the Marantz 7 and 8, or select McIntosh gear.
If you like it, enjoy it and don't worry about it's value. The market will take care of that for you.
If you like it, enjoy it and don't worry about it's value. The market will take care of that for you.