The Ibanez AD9... it's the legendary purple cousin of those original Tube Screamer pedals that fetch insane cash these days. This one dates to the early 80s; it's hard to narrow it down past that window. The quality of components and build is exceptional, and as such, the tone is rich, gooey analog goodness. Works equally well as a subtle thickener or an outrageous self-oscillating monstrosity. There's a lot to love, and surely this one is a safe investment. 

Model: AD9
Made: Japan, early '82-84 model
Type: analog delay
Power: standard 9v supply, 22mA draw approx
Switching: buffered bypass
Equivalent new street price (approx): $369aud
Mods: none
Accessories: no box or manual
Condition notes: used, chips in the paint and a couple minor dents, good condition