We have sold a couple of 350EX models (not EXR - before the R -- Regulated power supply board) for $995 each over the past two years, with a one year factory parts and labor warranty. They are very nice amplifiers.
Just for your info, upgrade cost from a 350EX to an Ultra series (new regulated power supply board, many audio board improvements, and more) is $699, including a new three year factory warranty.
Frank