Yamaha SPX990 multi-effects processor. Tested and working, with a clear, bright display and all front panel controls responding. Classic Yamaha reverbs, delays, modulation and pitch effects. Cosmetically good for its age, with paint scuffs along the rear edge of the top panel (see photos), which won't show once it's racked.

Collection from London SW8 (Nine Elms / Vauxhall) or near Finsbury station