I have a beautiful 1984 944 sitting in the garage for about a year now with a battery minder that leaks water and overheats.
I got probably half a dozen (or more) sprinklers that don't work or are marginal... drives my dad nuts but fortunately they go off in the morning when he's usually not around.
Also have a wing from a balsa wood R/C glider I inherited from my dad when he got half way through building it and lost interest that I finished. The wing is hung in my garage as an art object. When I discovered how fragile they are and that everyone in R/C gliders was going to the cheaper more durable Styrofoam gliders I figured it wasn't worth the effort.