Team Losi Grim Sleeper Yo-Yo - Purple by Team Losi. $10.99. he Grim Sleeper is no longer made. This may be the last chance to get them in mint, in-the-box condition. A traditional-shaped yo-yo with steel ball bearing and great sleep times, the Grim Sleeper features what may be the coolest side cap design ever! This is the 1999 Team Losi versions. Available in limited supply. Made in the U.S.A.