I can't fault ebay, I have had some great bargains and as one contributor stated just be patient and have your limit. Everyone has their limit on what it is worth to them.
Also, I have sold some stuff which I have had breat results form. Most of the stuff I have sold is either in new condition or was a quality item which some one has identifed and decided it was worth the price they paid for it. In addition, a few items were just tat (to me) but someone paid for what it was worth to them.
The issue with the router is that if that particular model is no longer available in the shops and has done very liitle work then obviously if the quality is there it will sell for a high price. I think from the interest in that particular model it was a quality model, no longer available.
We all have the choice folks to bid or not. I used to take stuff to boot fairs to sell but everyone wants to pay 10p for everthing (no matter what you were selling) just because it was a boot fair. I started taking my stuff to the dump or gave it away rather than give some Chav the benefit. Ahmen!