You make a sound point (pun intended) -- I also happen to agree that it is not necessary to automatically price your used gear at 50% below retail. The audio "blue book" often lists audio gear at about half of MSRP, but like the "blue book" price for automobiles, the price should be a starting point based on some common standards. Like cars that have low mileage and are in top condition, nearly new, non-obsolescent audio gear (such as speakers, analog preamps, power amps, tonearms, etc.) should retain its value better over time. Equipment that is subject to frequent technical change (such as digital equipment, surround processors, etc.), or subject to wear (such as phono cartridges) will lose their value more quickly.
When I price my equipment for sale, I try to decide what I think is a fair value for both me and the buyer. I take into consideration factors such as age and condition of the item, the price I originally paid (I set the price based on what I paid, not the MSRP), whether the item has a transferrable warranty (such as Bryston equipment), etc.
Ultimately, the buyer and seller must both agree on the perceived fairness of the price, and that perceived "fair value" may be 50% of MSRP, and it may be more.
When I price my equipment for sale, I try to decide what I think is a fair value for both me and the buyer. I take into consideration factors such as age and condition of the item, the price I originally paid (I set the price based on what I paid, not the MSRP), whether the item has a transferrable warranty (such as Bryston equipment), etc.
Ultimately, the buyer and seller must both agree on the perceived fairness of the price, and that perceived "fair value" may be 50% of MSRP, and it may be more.