Asus Z270 Apex, never seen any LN2, only liquid cooling. With receipt, original packaging and all the included stuff still packaged.
Asking for 155€ + Shipping to EU countries
Also, didn't plan on listing it here but to some people who use chillers or similar it might be interesting, it can deliver a LOT of flow if needed, I have two of them, thats why I am selling one of them (pictures will be added asap!):
EK Water Blocks Dual DDC 3.2 PWM with Heatsinks, 160€ + Shipping