You cannot buy happiness but you can buy Fishing Tackles, that's pretty much the same thing!
Seaguar FXR FUNE Flurocarbon Leader (100% Fluorocarbon)
Raiglon Nylon Shock Leader
Varivas Copolymer Monofilament Big Game Shock Leader
YGK Galis DMV+ns Nylon Shock Leader
YGK Galis Absorber Flurocarbon Shock Leader
Fisherman Super Stealth Nylon Shock Leader