slabbing get's dangerous when people start grading the chips in the slabs.
Who's the expert?
And it get's very dangerous for new "chippers" if somebody starts playing the expert.

An example of a fake slab. I bought it knowing it to be fake.
Collected NGC only but got tired of looking at the same PF70 everytime.

BTW: this is my laste one, I give you nice deal
https://www.ebay.com/sch/chiplord1/m.html?item=303154502447&rt=nc&_trksid=p2047675.l2562

Jo