Hi Vicki,
Great points to consider. I have felt this all along. Just because some chips, cards or what have you get slabbed never could tht mean all will. Just because there is a market for collectors to buy certain slabbed chips does not mean all will need to be slabbed in order to be sellable.
Good luck finding more rare chips like on your last weeks auction.
Let me know if you do find any so I can bid.