The 10 events observed produced no real discount. In 2 cases, the price had climbed about 17.6 % in the two weeks before.
The current price of $19.99 matches the lowest point recorded over the past 365 days, a level that has never been undercut before. Against the typical price of $58.47, that gap represents a 66% savings, the strongest discount reference available for this item.
This floor has only been reached twice over the year, for a combined total of seven days, showing that the window tends to be brief given how stable this price normally is, moving on average only once every 91 days. Also worth noting: past sales events delivered no real discount, and in two out of ten cases, the price was actually inflated beforehand to make the event markdown look bigger than it was.
Since this is already the lowest price ever tracked and seasonal sales events haven't historically beaten it, waiting for Prime Day or Black Friday offers little upside. Buying now looks like the more sensible move, especially since this price point has historically held for about a week at most.