Selling 3.73 gears for 7.5" rear

[LSC SS]

FRPP 3.73 gears for 7.5" rear ( V6 mustangs among others )
Installed used for 300 miles and taken back out, Includes Ring Gear, Pinion and Pinion nut.
$100 includes shipping (lower 48 states)

[HiFlow5 0]

$100 seems kinda steep for a used 7.5'' gearset.

[LSC SS]

I don't think thats alot, they are genuine Ford gears with only 300 miles on them, cost $199 new, from what I have seen even the aftermarket gears for that rear start at $169