also whenever i managed to bought 18yo from market they're not FT.
if you really want to get FT the best chance is bidding for 20-21yo.
even 19yo mostly not FT. i know this because i have buy a lot of 18-21 3* players.
the chance for 18yo 3* be a FT probably like 1% and now the frequent it's to be available in market is really low