I know we had a long discussion about this on slack but I will only spend money on are college bats from the first round. If I am competing I'll spend up to $2 on these bats and if I am not really pushing for a title I'll spend even up to $4-$5 on these players.
Here are some of the college bats from the past 5 drafts:
The caveat here is scouting. If I haven't seen the player live or can't find good video on him I will go with scouting reports available in various places. I'm looking for things like advanced approach or advanced college bat as keywords when targeting a player. If any player is expected to stick behind the plate I tend to leave them alone because catchers take forever to develop.
The players I have already started targeting in this class are Nick Senzel, Corey Ray, Zack Collins and Kyle Lewis.