Stamp Price Trends ...

Found this web site that gives the price trends for certain stamps over the past months..fun to check out.(like stocks,?)
https://www.terapeak.com/worth/categories/stamps/

This is just some kind of gimmick for ebay sellers. These "price trends" have absolutely no validity whatsoever. I don't know what kind of algo they use to generate them, but they are not based on actual price trends of the specific items shown. I can say this because one item I looked at was a postal cover. When I clicked on it it took me to an ebay listing. When I used the ebay function to check closed sales for this item there were none. So where did the nice little chart of dots of sales for the last 30 days come from? Not from actual sales of items like this one. Total garbage.

Basil

Interesting, just wonder if they have enough data to make the conclusion.

So what would be "enough data"? It's all up to interpretation.

Even pricelists with or without guaranteed prices can be unreliable. "Please ask for quote" instead of a price shows a legitimate seller listing scarce or upwardly volatile items. There are others who put a low price on things like that that are not in stock at all. It purposely misleads competitors and people selling to that dealer.

Well, in the case of the cover I examined, the answer is "no." There was NO data on which to justify the conclusion. It is being "made up" somehow. And without an explanation of how, I wouldn't trust it at all.

The chart is interesting, but I would have to agree that the data is off. If they were able to get better data, I would love to see the charts.

It's an affiliate link farm website. Its sole purpose is to get people to click through to ebay so the site owner gets a commission on anything purchased by the person who clicks through.

Affiliate revenue is a valid form of revenue generation when used by sites (like SCF) that serve legitimate functions. For a period of time I had ebay links on my website and may bring that back at some point.

However, there are a host of sites out there that look like informational resources that only exist to drive people to ebay, and the information presented is frequently questionable. They make up data that LOOKS like real information; it helps the masquerade.

Another area where this is prominent are bogus consumer review websites that are nothing but link farms for Amazon commissions.