[Cory]

1. - Yes same Greg Morris
2. - No - I don't believe they are cross listed. I could be wrong here on fixed price listings, but near certain the auctions are not cross listed.
3. I can't really speak to grading accuracy - I focus on low grade t206's so if it looks good to me I buy it regardless of grade.
4. Buying for me has been very easy both on ebay and off. I only participated in the auction so far on their marketplace and got some great deals - likely due to the "kinks" mentioned in the prior linked thread. I very, very rarely win any greg morris auctions on ebay anymore - prices tend to go too high and I'm cheap. As far as I can tell they haven't had any t206's on their marketplace since the auction. One interesting thing is they combined shipping for $5 - and I won over 80 lots. I think they do the same on ebay though. Shipping is fast and secure from both.