What are/were the best sounding cheap components you have ever had?

 I'm surprised Magnepan hasn't been mentioned yet (unless I missed it somewhere). I bought a pair of the LSR's for my son and a was simply amazed what those speakers could do at that price. 

I had Loxjie a30 ($180) + Sony sscs5 ($90).  Resolving treble and non-sluggish bass with reasonably large soundstage.  I enjoyed it.  

Dayton Audio class D amplifier - for less than $100 it punched a crazy sound! 
Amari LP10 turntable - around $500 in China. Very very good at this price. 
Dali Zensor 1 speakers. Surprisingly fantastic entry level speakers. 
Pure Avalon tabletop radio - it is by far my most listened piece of gear. It’s playing  almost 24/7 and it sounds great in my kitchen. 
Oppo bdp 103 - second hand. Great player!

Bluesound Node - second hand. This really made a change in my house for the best. 

Yard sale LPs and CDs some amazing finds for $1.00 or less great rock, jazz and classical music in mint condition especially back in the day folks were getting rid of their vinyl. Sometimes I’d come home with 50 pieces for under $25. I’ve ended up with thousands of great musical gems.

NAD 3225PE 40 watt integrated amp. It did it's job for the time being while being not expensive.