During setup of the dash button you tell amazon what you want the button to purchase. When setting up the button you get a few choices to choose and you pick one to link, so whenever the button is pressed it will order that exact product. When you pick the product you’re also told the price.
I have noticed on other "platforms" (I don't use Amazon, so it may be different on it) that vendors must be using some (evidently crappy) software to "re-align" their prices automatically to market/competitors/whatever and this makes from time to time some egregious mistake.
Recent anecdata, a couple weeks ago I bookmarked a plastic bench that I might have been interested in buying but had no "urgent" need for, I found a vendor selling it for 148.50 Euro (there were a number of other ones selling the same article ranging from 150 to 170 Euro).
Last week I accessed the bookmark and found that the price was now 1,148.50 Euro (and I just checked, it is still at that).
But I have seen it happen several times.
Not that anyone would have a dash button for that, but I suspect that the same can happen for common, ordinary house supplies.
