I am moving up the DAP food chain to an iBasso dx300 and am selling my fiio x7mk2 with the AM3B amplifier, which provides both 4.4mm balanced output and 3.5mm single ended output. I have used the 4.4 balanced with iems (for trains/planes) and the 3.5 unbalanced to my car stereo aux in (on the road), so there is a lot of flexibility.

If you're reading this, you probably already know that this is one of the only few flagship DAPs released to feature dual SD card slots--I ran mine with two 256GB cards but others have routinely used 2x 512GB, giving me more than a terabyte of storage on the go. I have heard that the player may work with good quality/legit 1TB cards (Samsung, Lexar or SanDisk) but I have not tested it out myself so I cannot guarantee that will be case.

I have installed the AM3B amp module and kept the original AM3A balanced module (with 3.5 SE and 2.5 BAL jacks).

The condition is good, no cracks or significant scratches.
I will put up photos soon and will also look around the house and see if I have the original box, etc.

I am asking for $349 and will throw in a 256GB microSim card.
PP friends and family is certainly appreciated but not required; I will cover insured shipping in the US--please drop me a note if this package needs to go elsewhere; and thanks for looking!