Okay, here's something quick and unexplained.
Absolutely will not trade: Clotches, bucket, blanket, chopsticks, knife, rebar, our spellcard, Eientei letter
Most likely will not trade: Sack, granite, booze, oni's card
Would prefer not to trade: Iron pot, blank card
Indifferent: All non-booze comestibles (within reason), scarf
Actively want to dump: Empty bottle, sword hilt, wok
Feel free to ask about any of these assessments.