Nice portable WiFi analyzer, but display is expensive

I like this build, and ironically most of the parts are pretty cheap but…the LCD used.  I did find one on ebay for under $8, but most go for $20 and up.  My 2 cents, if you can keep the build under $20, it would be worthwhile, else….I would just download a wifi analyzer for my phone.

https://www.instructables.com/id/Portable-WiFi-Analyzer/