This rare knife came from the 30th tier of the Main Event during the 2018 Halloween Event, and it hasn't been obtainable since the event ended. The green-and-black look fits the Halloween theme. It's stable now, so expect to trade rather than find one in a box.
Toxic (2018) is a Rare knife in Murder Mystery 2. Its combined value is 6.5, #22 of 146 rare items and #386 of 921 valued items overall. Demand is low: it sits in inventories for a while, and buyers often ask for a discount. The value went down 19% over the last 7 days.
Closest in value: Shadow (6.5), Vampire (2018) (6.5), Aurora (2019) (7). Use them as a benchmark for a fair one-for-one trade.
Value history
What it is worth in other items
1×Shadow
1×Vampire (2018)
1 : 1.1Aurora (2019)
1 : 1.1Broken
1 : 1.1Frostbite
1 : 1.1Heart Pet
1 : 1.1Ice Dragon
1.1×FlamesHow many of each item equal one Toxic (2018) by value. Demand differs between items, so check it before you trade.