Harman Audio offers the factory-refurbished JBL 50-watt 4-Channel Car Amplifier
, model no. GTO-504EZ, for $89
with free shipping
. That's tied with last month's refurb mention as the lowest total price we've seen. (It's a current low for a refurb by $31.) It features set-up CD, built-in variable electronic crossovers, and variable bass boost. A 1-year Harman Audio warranty applies.