Books as an investment

My first book, Fractured Veins & Broken Dreams, has been out of print for about 3 years now. Occasionally a copy appears in the collector market, but even that’s dried up in the past years or so. I got an email this afternoon that a dealer in Florida has a copy – for $206.49. When I get it updated and re-published (sometime in the not-too-distant future, I hope), I think I’ll hold a few copies back as an investment!