FYI,
Muramatsu America sells used flutes, including AD models.
http://www.muramatsu-america.com/usedflutes_m.pdf lists several in the $3800 to $5500 range that may still be available for immediate delivery if you choose to replace. It is not unusual for appraisals to come in a little high. I am pretty sure they will let you buy one on approval and send it back for a refund if you do not like it.