
The 2 events observed produced no real discount.
At 19.99 dollars, the listing shows a 75% discount against the 365-day typical price of 79.99 dollars, though that gap says more about how high the reference price sits than about an exceptional deal.
The all-time low of 18.99 dollars only held for 0.6 day over the year, so it is not a realistic target. The current price, by contrast, has been hit twice and held for 8 days total, making it the real attainable floor. Pricing is also very stable, shifting on average every 46 days, and the two shopping events tracked brought no extra discount.
Given that stability and the lack of gains during major sales events, waiting for the next one likely won't pay off. At 19.99 dollars, the price already matches the realistic low point, making now a reasonable time to buy if the product fits your needs, with little reason to expect a better deal soon.