I was genuinely surprised when I started comparing the prices of used mods to new ones... To say that they hold their value is an understatement. I look for used goods to be in the 50-60% of retail range but PV mods seem to be pulling 80% or more of their initial value. Is the supply really that low and the demand that high ? Is their usable lifespan really that long that they don't depreciate ? Please don't take this as a criticism of anyone selling in the classifieds. It's an honest question that I really don't know the answer to.