Just Bought Some Mcslabs Off Ebay

$28 a coin for MS or sliders? Good deal!

The ANACS slab is from the Amos Press ownership, based on the seven digit serial # starting with 2, it's towards the end of the SWH (Small White Holders) era. By April 2000 - when the bar code becomes the longer version - the ANACS grading had become more 'market' grading than the technical grading of early ANACS. With gradeflation, it's probably today's MS62.

ANI is junk. Crack them out and they are as likely to be AU cleaned as MS6 anything. You didn't pay outlandishly for AU cleaned coins so don't feel bad.

PCI... again by the era of the these, grading was iffy.
10 digit s/n + two codes - 1991 to late 1999/early 2000 - the good greens
14 digit s/n + one code - late 1999/early 2000 to September 2001 - the not as good greens
9 digit s/n + one code - September 2001 to March 2002 - PCI owned by Leslie Shade - the not good greens

After this comes the solid gold border

Also be aware that there are "fake" good greens out there, these date from 2009 or 2010 through at least early 2013. The tell on these is that the green border line on the 1991-2002 version is actually micro-printed "PCI". On the fake good greens it's just mushy blobs instead of letters - obviously so with a loupe.