Looks like a neat toy, but for real DX work or serious program listening it's
performance would be lacking. I'd use the R20 for very casual listening ...
"lets spin the dial and see what I hear".

For $500 you can do much more through the used market. The Icom R75 or older
R71a, Drake R8a would be much better. Use the rest of your extra cash for wire,
coax, headphones. $1 spent on antennas is worth $10 in the radio.

John K9RZZ
Milwaukee
Icom R71a
Kenwood R1000
Yaesu FT767gx
Yaesu FT736r