What items are valuable but a new player wouldn't know?

I'm relatively new to the game and I'm in the process of modifying my personal loot filter.

Some examples of things I've learned that are valuable that aren't that apparent.

Normal ilvl 84 Fingerless Silk Gloves - 100 Chaos
Most ilvl 84 Crystal Belts - 1 Exalt

Anything along these lines would be appreciated.

Poe.trade has great filters. Set it up for normal items with value over 100c and you'll get your list. There are also some standard filters floating around out there that you can drop in.