Posted By:
peter chaoAdam,
The above posters have more experience than me, so you should probably listen to them, but in my humble opinion go for rarity first.
So if the lot has a few rare cards then that's the lot you should buy. But normally, the rare cards will be sold individually, in that case buy them individually. If the card is truly rare, don't worry too much about whether the card is slabbed or raw.
However, if the card has been counterfeited before, buy it only slabbed.
Good luck to ya.
Peter