An almost unused 1993 Camaro Z28 with only 89 miles is currently listed for $25,000. This Chevy coupe previously sold for $13,500 in 2020 and $16,000 back in 2018. GM’s 5.7-liter LT1 V8 engine produced 275 hp in 1993 and uses a four-speed automatic. Chevy built over 39,000 of…