If I was looking for something, well say a cup or saucer or a lid to match a set I had, I think I would be relieved just to find it! And I would expect to pay a little bit more than the original shop price, especially for an older item.
So in one way it may be a little highly priced, but to me it would be 'wow great thanks'....
You are welcome to me listening to your "rant-of-the-day"! Whoever had the temerity to "chastise" you deserved your rant and I hope you gave it to them.
Oh, and BTW, welcome to eBid and the Forum, I don't think we have met until now.
Agree with cheaver; IMHO your items are yours to sell for as much or as little as you wish. Oh and welcome to the forums.