Cliffs for those that don't want to read all the reaming:
Guy lists NEW gears for $100+$15 shipping.
Buyer sends check.
Guy cashes check, edits price to $125+$15 shipping.
*insert flaming*
Buyer says send me the gears or send me my money.
*insert more flaming*
Buyer dinds out the gears which are actually USED
Note: differential gears are very easy to tell of they've been used or not.
Buyer asks for the money back.
Guy sends off USED gears.
*insert much more flaming*
Guy sends off money order to repay the buyer.