Aurora comes from the 2019 Christmas Event, where it was the tier 20 reward in the main event. That event is over, so the only way to get this rare knife now is through trading. Its look ties into the winter theme, and that keeps some collectors interested. People who want a piece of that event still ask about it, but it moves slowly in trades.
Aurora (2019) is a Rare knife in Murder Mystery 2. Its combined value is 7, #21 of 146 rare items and #376 of 921 valued items overall. Demand is low: it sits in inventories for a while, and buyers often ask for a discount.
Closest in value: Broken (7), Frostbite (7), Heart Pet (7). Use them as a benchmark for a fair one-for-one trade.
Value history
What it is worth in other items
1×Broken
1×Frostbite
1×Heart Pet
1×Ice Dragon
1 : 1.1America
1 : 1.1Boneblade
1 : 1.1Cavern (2019)
1 : 1.1Eternal IIHow many of each item equal one Aurora (2019) by value. Demand differs between items, so check it before you trade.