Considering a one to three month stay in Berlin. Would be looking for a furnished apartment for my wife and I. Any ideas on the best way to find one on the internet?
Try VRBO
Watch your three month limit. You are limited to 90 days and not three months without an extended stay visa. Also work with a creditable apartment finder services. There are reports of apartments rental fraud on sites such as Craigs List. VRBO, Homeaway, etc., are generally reliable because they do try to police their lists but problems do slip through. Just do a lot of double checking.