In Inherit The Wind, attorney Henry Drummond tells an All That Glitters warning about a rocking horse he wanted when he was a child. It was far too expensive for his family to get for him, but his father scrimped and saved and managed to purchase the rocking horse for Drummond as a Christmas present. And the first time Drummond got on it to ride, it fell apart from dry rot.
Seems to me like it's a Shaggy Dog Story about Wanting Is Better Than Having, though — Drummond wanted the rocking horse so much that his father worked like crazy to get it for him, but the reality (the dry rot) was completely anticlimactic.