I was prepared to buy the skin when I heard it would be coming back. I was excited to have a chance to. However, I see that it only appears to be available as a part of the bundle.
I already own Imperial City, and I am not going to pay for it a second time. I'd like to buy just the skin, and I'm not alone. Others might want just the horse. I'm not just going to complain without making a suggestion, though, because that isn't constructive. I don't know if this will even be considered, but I think a lot of players who won't be willing to buy the bundle would be willing to pay a still fairly large amount for the individual pieces they want...especially since many or most players already own the DLC and aren't going to want to pay for it again.
The original price for the skin was, I believe, 1,200 crowns. It was a limited time thing, but unlike most limited time offers, it never had a date, and a lot of people didn't know it was going away. I think if you put it in the store for a bit more - 1,500 or 2,000 crowns - people will buy it, and the people who bought it before won't be too upset, because the people who didn't get it during the limited time have to pay considerably more.
I don't remember the cost of the mount, but I would suggest a similar compromise for it.
Respectfully,
Lizzy