The most common cause of low prices is pessimism - some times pervasive, some times specific to a company or industry. We want to do business in such an environment, not because we like pessimism but because we like the prices it produces. It's optimism that is the enemy of the rational buyer.
There is an optimism which nobly anticipates the eventual triumph of great moral laws, and there is an optimism which cheerfully tolerates unworthiness.
We should cultivate the optimistic temperament, and endeavour to see the good that dwells in everything. If we sit down and lament over the imperfection of our bodies and our minds, we profit nothing; it is the heroic endeavour to subdue adverse circumstances that carries our spirit upward.
We look for some reward of our endeavors and are disappointed that not success, not happiness, not even peace of conscience, crowns our ineffectual efforts to do well. Our frailties are invincible, our virtues barren; the battle goes sore against us to the going down of the sun.
Most of us stand poised at the edge of brilliance, haunted by the knowledge of our proximity, yet still demonstrably on the wrong side of the line, our dealings with reality undermined by a range of minor yet critical psychological flaws (a little too much optimism, an unprocessed rebelliousness, a fatal impatience or sentimentality). We are like an exquisite high-speed aircraft which for lack of a tiny part is left stranded beside the runway, rendered slower than a tractor or bicycle.