My broke self would have to do the slippery slide, bust my head open, break a leg, break an arm, crack a few ribs, end up in the hospital every day of the week situation. Before I paid this price! Please tell me this is a price mistake?? 
It’s for 20 bath mats, not one.
We change our very similar bath mat out every 4-6 months. These types of vinyl/TPU bath mat tend to yellow over time, and I can’t figure out why. I suspect that they gradually absorb sebum from your feet and discolor like certain charging cables.
That said, I don’t think I need to stock up on 6 - 10 years worth of shower mats. I expect that the ones remaining in storage near the end of this time would be yellowed anyway before we even used them.