Well without holding the card in person, I would say the SGC card grade looks to be right. Nice card, although looking at my avatar may lead you to think bias on my part
I wouldn't proclaim the T205 Joss card to be more common. I think that just like any other valuable card, they appear in cycles, times when you can get good return for them.
I've beem spying around trying to find a good price on a SGC McIntyre, and looking through the last 3-400 listings, I see a half dozen Joss cards and only recall seeing one McIntyre (priced too high) That surely doesn't tell me that Joss is six times more available. it just indicates that selling a $900 card is more favorable than selling a $40 right now.
Folks here mention the cold temperature of certain sets, t205 mentioned frequently. That seems to be the case, but if you have Joss, Cobb, Johnson, Wilhelm in that set for sale, your cards are going to be pretty stable. Selling Beck, Austin, McIntyre, or Stanage could bring some low prices right now, so you may as well hold onto them...