Str is valued higher than any other stat. I know i would never use a drag with less than 825. Yours has 823. If it was 823/825/105/X then it would be worthy of 500k+. This is why you aren't seeing the results you want from this particular auction.
Yes already decided to take this auction down just didnt have time to do it earlier. Weird tho because I sold a 823/824/104/457 for 200k within 4 hours of listing it. Even at 823str. Still a awesomely nice dragon.
From everything I've ever read, a dragon's fire breath damage is base on hp and has nothing to do with str. So if you have two dragon, one with 825 hp 820 str and another with 825 hp and 825 str, the damage from fire breath will be exactly the same. I've never understood why everyone is so worried about max str. It's not like your dragon can carry more loot or something.