I agree... MANY things should be impossible to throw in the bin just for points. Treasure maps for a start!
Unfortunately, its almost impossible to even find a workable price-check these days. I havnt had any luck with those auction boxes even with a vendor selling the same item right next to it for more money... buyers end up taking the bigger price for the same item.
Honest... the best advice is to find a dealer of high end goods in game, see if you can make contact. Not even this system is 20% of what it used to be 7 years ago.
Added problem... this globe... they all look the same. For me, I more or less target things that are abnormal in looks for my tiny rares museum. I have an old-old nose-maker, from the origional clean-up... that looks just like the snow-globes, unless you click on it. Clearly, moving past it.. you'll know right away from the sounds something special is under you. hehe. I think every generation of staff we've had has been a little "loose" on artwork + new rares. Look at all the new EM rubbish. Some are quite special, but just recolored. Even that can be highly attractive... sometimes.