Never Used -- in Sealed Box

I did this only once. I purchased an Oppo 205, one of the last in fact to use in a bedroom system. I soon changed my mind on the setup for this room and went in a different direction. I never opened the box and I already had a Modwright 205 in another system. About a year later I sold it. Im embarrassed to say for how much.

Dealers have to buy minimums to carry product lines.  Thinning the herd. 

I have bought and sold NIB/Never used/only opened to check shipping for :

Belles Aria Integrated
Rega P6
Harbeth 30.1's
Various cables

Context: 
Belles: I was purchasing a new turntable and DAC from a dealer. The dealer offered a 'bundle' to me... an in stock unit at a ridiculous price. Why the price? I did not ask. I had heard so much about the Belles that I thought I would try it. After owning for about 6 months I realized I was happy with my system and rather than just 'try' it I could sell it for more unused. The new owner was thrilled.

Harbeth's: I found a brand new pair at another very aggressively low price on another site (non-Harbeth/unauthorized re-seller). Thought I would use them for a second system. The speakers were received and opened by me. they were mint. Here is the catch....they traveled around the world. Came through Greece. A dealer there left the AD network and liquidated out of market. I never hooked them up but they were verified authentic by Harbeth and I sold them to an Agon member. He is happy. 

Cables....commonly, not always, available new at reduced prices that are easy to re-sell. In some cases, dealers are reluctant to advertise them as  'new' and opt for 'demo' but when I received some of them them it was clear the packing was never opened. Some I never used. 

All of the above were sold at a modest financial loss. 

FWIW the advertisements are sometimes legit. Caveat emptor.