He got a right hand sleeping bag as a reward for doing an amazing magic show!! with Tsuna during the Daily Life arc. I think it was somewhere around the 50s? Ah, the good old days.

And I always think that Gokudera owed Lambo that rescue in the Ring battles. Out of the guardians, only he and Tsuna seriously understood that it was not lol a funtimes sporting match when Levi jumped up and down on Lambo's tiny broken body, and Gokudera STILL didn't help him. Thank God Tsuna is remotely sane.