Garage Kit is a term loosely applied to amateur or semiprofessional or (in the case of the Japanese) even highly professional model kits, usually created in someone's spare time and garage - hence the term.
Most garage kits are cast resin. Garage kits can vary widely in quality, but many are superior works, equal in quality, artistry and workmanship to those produced by professional kit companies. Some garage kit sculptors are commissioned by pro kit companies to create designs.
Garage kits are frequently limited to a certain number of copies, which adds to their appeal to collectors.