Hah - I bought one for the (normally lowest) 70% off price of $17.98. I decided after a few weeks there was no way I wanted it for that much and returned it. I should see if it went back out at $4.58. But if so, it probably got bought by now.
Back in the good ol' days of Target clearance, stuff used to hit 90% off all the time though.
Seeing stuff at 90% off happened often enough near me (although not 'all the time'), then it completely dried up so I just got used to the most being 75%. Then they switched to the 30-50-70 scale and now I've adjusted to 70% being the most. Hopefully no new changes this year, it's bad enough that they've improved slightly at inventory management.
I expect a truckload of clearance in January / February considering at least two of my stores have an entire front register endcap full of games that have nowhere to go now but the stockroom. Here's hoping at least!