Think about this: Not only have Satoshi's coins not been sold or spent; Satoshi's coins haven't even moved.
Except for a 10BTC test transaction he spent to Hal in 2009, and maybe one or two coinbases that nobody noticed or tracked down to him, they are all still sitting there untouched in his mined coinbase txOuts. I have a list of over 5000 of his coinbase addresses, and they have not budged. He hasn't consolidated coins in one wallet, he hasn't tumbled coins, he hasn't bought anything from overstock.com or anywhere else.
We're talking here about someone who could cause deep unrest, perhaps bordering on panic, just by generating a new address and sending 50BTC from one of his old addresses to it. I can name dozens of places that would light up like Christmas trees if even one of his known addresses moved; hell, my own computer would light up like a Catharine wheel. I'd have a text message within fifteen seconds of a transaction spending one of those addresses hitting the Bitcoin network, and that message hasn't been sent even once in the months since I set up the script.
I just met with him he sold me 2 addresses. He liked my thread on the genesis block and told me I am worthy of holding the keys for it. So I now can remove the 15 + btc added to it if I chose.
He also wonder If I could buy an early address for him and keep it untouched for another 67 weeks you know right after the next half happens.
So I took out my stash box and hand him 1,000 100 dollar bills and said sure man no worries.
My point is I could send him to 10 buyers of his coins that would keep the address frozen for a few more years.
So you can't possibly know if he sold them all to a trusted few. Unless of course you are him the great satoshi. Just playing with us.