I know Americans enjoy the lowest consumers electronics prices in the world but in Europe it's at least 20 Euros which is more than 20 USD and even at 20 euros it's difficult to find, with most shops asking for more than that.
You'll quickly find that the price differences mostly reflect some combination of various laws and taxes. E.g., I recall reading (pre-Brexit) that UK law required shops to have a two-year warranty period for durable items sold. As in, you bought it from them, you could return it to them and get a new item. Or make them deal with the warranty. In the US, almost anything other than dead-on-arrival can (doesn't always, but can) require the consumer to ship it in the original packaging to the manufacturer's service center at their own cost. That is not a free service. And there may be tariffs involved.
Remember that prices in Europe include sales tax, so the price you see is the price you pay. In the US you need to add sales tax on top, and in some places all sorts of random extra charges like ‘employee healthcare mandate’.
The calculator version (which I use) is rated for three years, assuming you only let the alarm go off for 20 seconds per day, and use the calculator function for less than one hour per day: https://support.casio.com/storage/en/manual/pdf/EN/009/qw320...
use the calculator function for less than one hour per day
I really want to meet a person who is hammering away at the calculator function on their watch for more than an hour per day. That would clearly be the coolest person in the world.
CASIO is known, and I can vouch for this from experience, to be very conservative with their numbers: with a quality cell 7 year battery life usually means about 10, 3 year battery life usually means around 5, 30m water resistance usually means over 50m in practice, 30seconds/month accuracy usually means around 10 or even less, etc.
