250 bucks is the price of a mustang neck by itself, i doubt you really need new tuners.
buy the guitar, take pics. post them, then take the guitar to a respect tech or luthier and have it properly set up.
if they are plastic klusons they are fine, i have a set from 59 that still work magic, but if they are the f keys, then they may need a lil tlc.
either way.
BUY IT! and then PAY TO HAVE IT SET UP ASAP!