Oh! That fellow has returned. I remember buying a bunch of portraits from the ‘Book of Heroes’ for gold — sometimes just because of a nostalgic soundtrack from WC3, if nothing else 
, although the one for Uther is a bit ironic: it’s the new (at that point) Alliance theme added in TFT, when Uther was already gone. Anyway, it’s one of my favourite Paladin portraits, glad you got it, too!
I think I only passed on Valeera and Anduin, since I really didn’t really like or want the art, nor was the ‘feel’ anything special, and Garrosh, whom I didn’t like as a character at that point, and I wasn’t particularly impressed with the portrait either. As for Uther — I liked his adventure and thus wanted to commemorate it, liked the portrait itself, and there was also the soundtrack as a bonus , so it was an easy pick for me back then.
Thanks, that makes two of us.
But anyway, back to the point of Second War Uther’s previous availability:
https://hearthstone.wiki.gg/wiki/Second_War_Uther#Previous_availability
(also confirmed by some web searching, for example: https://www.startpage.com/sp/search?query=site:hearthstonetopdecks.com+'Second+War+Uther' , https://duckduckgo.com/?q=site:hearthstonetopdecks.com+'Second+War+Uther').
So while it’s not the first time this portrait has returned, being available for gold, it has indeed been a while since he dropped by.
By the way, 1500 gold for a portrait of that quality — custom frame, animations and ‘emotes’ plus a card back — is a good deal by HS standards, the ‘base’ price can be estimated at 1800 (think of Alleria, Magni, Medivh, Khadgar etc as normally available via the collection), and this kind of offer, which we see occasionally in the shop, is also a discount of sorts.
I once wrote a lengthy post about it, but it got deleted. In short, I predicted dummies and nappies as a possible theme for some next expansion. Perhaps I’ll post some excerpts from it below.
Click to see more.
I’d like to point out one aspect in this game’s evolution over all these year (even Nathan was talking about it, too), namely maturity.
So, what was the game like in the beginning?
‘I have no time for games!’
‘Take heart, young one…’
And even if you take something more light-hearted than themes related to dying, taking care of children after you pass etc:
‘I can wait and fish all day!’
Come to think of it, you can’t say that all those… modern types with cultivated ADHD have this kind of patience (see, for instance, this post again, by the way… speaking of repetitions), so you don’t have cards like that anymore, but lemme get back to the point: all of this sounds quite mature to me. You can’t say that something like Naxx looked like sugary Disney cartoons either.
Then came Un’Goro,
But what about now? Look at the recent themes: ‘Pee-pee’ * , ‘ca-ca’, all those toys…
So, the question is: what next?
The theme of the latest expansion [that was PiP at that point] has already been revealed, and they supposedly have the next one planned as well, but if I were to hazard a guess and try to make a prediction, it’s only a matter of time before they release something featuring nappies, dummies and so on…
I think is is really strange, some older portraits are better for gold than the other ones which are on the paid reward tracks recently… 
Thats why I didn’t buy a tavern pas for PIP… I found all the cosmetics lame… they are good for kids maybe… but not for adult players.