John, of course you are right, but I was assuming that the low hours was in fact, the truth, as in the amp has 1,000 hours of use or these exotic matched tubes have been used for 2 months or 500 hours and they are known to have a lifespan of 10,000 hours. Remove the truth from the equation and you've got nothing but nice photos to make your purchase from. Low hours without numbers means nothing, but as a buyer, I would want a number. If you are going to buy used, there is always a certain amount of trust and you hope that the seller has some integrity. BTW, there have been many cases of sellers claiming low mileage on cars that they have tampered with the Odometers. It comes down to the principles and the integrity of the seller. Fortunately, every seller that I have dealt with on Audiogon has been truthful!