I had a 69 2 dr valiant. Loved it, but didn't drive it enough. I sold it so someone else could use it properly.
Do I regret selling it? Sometimes yes, I'm sure my boys would have loved it. But, it wasn't practical and wouldn't have been used enough. One day I might pickup another classic car, but for now it's about practicality.
If you aren't using it now, sell it. You'll miss it, but get over it.