I do not currently have in my possession $100,000 worth of bitcoins (I do however have $100,000+ of USD). However, I would be purchasing whatever amount I would be selling prior to the transaction. This is why I'm interested in dealing in person, because it takes away most of the risk that the buyer will fall through. Disclosing anymore on this public thread would give away too much information on how my business makes a profit.
Wait, am I understanding this right? Maybe I'm just misreading it, but you're basically saying that you have $100K USD that you'd be willing to buy BTC with so that you can immediately turn around and sell for $100K USD? That makes absolutely no sense.