There have been many used FR-7x's listed for sale in the past. Your best bet is to get one from a Roland Authorized Dealer. They take them for
trade ins quite frequently and offer them with a warranty for around $2500 to $3000 USD. The FR-7x screen problems are no longer a problem
as my good friend Mike Dubrovsky of Fla. is making a screen replacement that is larger and brighter than original. That original firing
cable is no longer necessary as I make a 24 volt power unit for them. There are many owners that prefer a FR-7x to a FR-8x (such as myself)
as it is lighter and smaller in size to a 8x. The 7x is louder than a 8x and can be tweaked with flash drives to mimic a 8x.
Best to call a few Roland Authorized Dealers to see if they have one in stock or put your self on a waiting list for a trade in.
You may start with
https://www.falcettimusic.com/ Dial 413 204-5522 ask for Sam and tell him Jim sent you.
And just a note - many of you are familiar with Rich Noel ( a member here) Rich is one of us that prefers a 7x and uses it
for all performances.
https://www.noelaccordion.com/ &
https://www.noelaccordion.com/roland.html?