I got mine from Abbeon Cal--$939 each. Expensive, but worth it: they change from weekly to daily, easily accessible, easily readable, energy efficient (the initial non-alkaline batteries lasted 2 years!). Kind of hard to clean, though, and they are extremely delicate and get out of whack easily. Documentation is not very detailed either (they are German-made, by Lufft, and they apparently made the decision to keep the English documentation to diagrams only and very little text). Best for storage areas, with something more durable for very public areas. Call (805) 966-0810 for a catalogue. Julia Moore Indianapolis Art Center