Here is a fine example of one of the best Reverb pedals to come along in the golden age of effect pedals. This Holy Grail functions A+ and is cosmetically super clean, hardly a blemish anywhere. Does not include power supply, but one can be picked up easily enough on Reverb. 

The Holy Grail is the first iteration of Electro-Harmonix's popular Holy Grail line, which has spawned many other makes since the original's production. The original Holy Grail features three reverb settings: Spring, Hall and "Flerb," a flanged reverb effect. Simple to use and sounds beautiful.