Having just sold my ST-10XME due to health preventing me from spending the time to use it, I have the same situation with my Tak FSQ-106. This scope was bought new in box last fall and still has nearly 5 years left on it's warranty. There is nothing like the view from a Tak APO as it snaps into focus. The quality of the Tak lens systems are the best I have seen in this perfectly color free, flat 88mm image circle. With a 530mm focal length, a very robust 4" focuser and F/5 speed, no additional flatteners or reducers are needed. There are a couple of small nicks in the tube holder paint where the tightening bolt slides into the notch. The OTA has no mars at all on the paint or the glass.
New price from a dealer with finder, finder bracket, tube holder, Tak diagonal and Tak 18mm eyepiece is ~ $3975. I will sell for $3475 plus shipping and insurance.
Will except cashier's check, U.S. postal money order or PayPal.