I was unlocking skins this evening by buying medium and heavy armor off the TP that I didn't have. When I was buying the Iron Legion heavy armor, I accidentally spent 60g on the shoulders. I hadn't realized that they were so hard to get (the rest of the set is craftable so it's only 5-30 silver) and just blindly bought them- then saw that I had gone down from 100g to 40g. Buying useless green armor. I stupidly salvaged them before looking it up on the wiki and finding out I could get the skin for a few medals of honor.
So can we please have some sort of warning? Maybe if you're buying something that's over 1/3 or 1/2 your current amount of gold, and you have over 10g? Or maybe if you're buying a white/blue/green for over 10g? Or just the option to set your own warnings? I'm just frustrated because I wanted that gold to go towards something more useful, like the legendary I'm working on.