Now you mention it, I did see it on a couple of items a while back, but it doesn't seem to be on everything.
Personally, if I really want to see how much similar items are selling for, I would tend to look up completed listings for myself, as there are a lot of factors that could affect price or whetehr I would buy-whether it is new or not, size, condition, where it is located, postage cost, colour etc
but I am guessing a lot of customers wouldn't have a clue how to do that so it may be useful to them as a guide.
But I take it a bit like those facebook messages about trending topics-you ever see any of those? Sometimes they claim about a squillion people are talking about some obscure topic. I don't think so.
These things are a rough guide but to be taken with a pinch of salt. Just my opinion.
