Haven't done so yet but getting close to it.I have a lvl 4 artifact that has become obsolete but It started as lvl 1 and I spent the supplies to get it to lvl 4. Each individual tier is at lvl 3. Now what I'm wondering if when you click the item it shows what you would get if you sold it yet it only shows fragments and blueprints as the sell value but I used supplies in there as well so shouldn't there be a refund of that even if it's a small amount because supplies are hard to come by. The only artifacts that show supplies as a payment are the legendary ones. To add on, if you sell the legendary ones which you've spent blueprints to do upgrades on it, shouldn't you get some blueprints back? Thanks for the info.