High-key need some help (Tarkov)

[Holo]

My friend is super into this game. And loves to run reserve, He spent two weeks getting me a red rebel and i lost it. I accidentally sold i when trying to sell something else (its 6 mil) what i sold was 80k. i had no pop-up for the "This item is WAY lower than its real price" and idk how to tell him at this point 

Should i tell him or just keep up the ruse of not liking reserve/Happen to die mid-raid 

 

[Sixta]

Tell him lol