What does a 20% discount mean?

[Matthew Brand]

I was reading through the 7 years to 7 figures doc and it called out that you should only be buying properties if you can get a 20% discount. I'm a little confused how you know what an appx discount is on the property. Real estate doesn't have a sticker price, so you can't necessarily say for sure that it's a 20% discount. Is it saying you should buy it for 80% of what you think you could sell it for after some improvements?