Think about it. Why sell a raw coin if NGC or PCGS will grade it.
When I see a dealer inventory of nice NGC and PCGS coins mixed with raw coins I figure the raw coins were body bagged. If not, they would be there with bright shinny NGC or PCGS slabs. Yes it is possible to pick up a bargain, but I would rather be safe.
I buy and sell coins on ebay. I avoid disappointment by only buying and selling NGC and PCGS graded coins. Here is a nice one I recently bought at Morphy ebay live auction.