Pawn Shop 09 S VDB Lincoln?

If that's the price and, it's the real deal, my advice...buy it quick.

There is no way that they will grade the coin, they might go down on price a little just to move the coin. I was there when the coin came into the shop and there is no way that it is fake

This coin has been valuable for a long time, and consequently fakes can be in a collection for years. Authenticity is all about the details, and (much) less about the coin's history. Unless a pawn broker is very knowledgeable, they can be fooled too. There were only 4 obverse dies used on the 09-S VDB; the four mintmark positions are listed below. Fakes are often made by soldering on an "S" mintmark, sometimes using the wrong type of "S". As others noted, there are many fakes out there, and it's best to buy slabbed, unless the pawn broker offers a money-back guarantee.

They paid $25 for two board books and a ziplock full of 40's and 50's...they didnt even look at them to see what was there, so they paid something like 12 cents for the coin

I agree, $800 for a raw coin that's frequently counterfeited is a high risk transaction. Buy one that's been correctly graded by a reputable TPG and from a reputable dealer with a return policy. Pawnshops, even though they handle coins, are not coin dealers, and I wouldn't buy a raw rare coin from one at Greysheet bid.

You have made a wise choice. No sense taking a chance with a coin that costs that much or one that is highly counterfeited.

I would be extremely cautious on this.

When I am in my favorite pawn shop and coin comes in am I might be remotely interested I offer 50% above what they just paid as soon as the seller leaves and 9 times out of 10 they hand them right over. I have made a few very nice buys this way but end up with a bunch of stuff I don't really want in the process.
For example, I bought 33 rolls of wheat's a few months ago for $1.50 per roll. I was in there when the guy came in with them and was paid $1 per roll. I pulled 4 coins out of the rolls for my album and kept all the pre 40's as I have a ton of 40's and 50's already. I was left with 28 whole rolls that I consigned to a local auction house for a 10% sellers fee. My final take was $189.00 on the deal plus 4 filled holes and 4 coins short of five whole rolls of pre 1940 wheat's.