The 'market' will determine - as always.
If you put it up for sale and you don't get any serious offers, you know you need to come down somewhat. I'd forget about getting absolute top dollar for it. Rather concentrate on just moving it on and getting something back to spend on something more useful to you.
If you make it seem very appealing as a second hand alternative to someone wanting the same item new, it will go. For me to buy, it would have to be lower than 2/3 the new price, or I'd rather buy new and get a full guarantee. But that's just me.
Just my 2c
