You’re not on an error page.
Just wanted to say this up front since the headline says “page not found.”
Anyway, the concept of error page selling is something I’ve stumbled upon a couple of weeks ago when looking at a product called Wishlist Error Page Booster (WEPB).
I didn’t actually buy it because I don’t have a membership site, but the idea itself is brilliant.
In short, it’s all about turning your error pages into sales pages.
In a minute, I will show you how to make this possible on any WordPress site for free, but first, let me give you a WEPB example: