I wanna know whats a fair value for my Sony XM5s.  
These have been lying around for more than a month or two. 

For context, the headphones are approximately 3 years old and have never had any problem even once, probably the best pair I've ever had. One day outta nowhere the hinge breaks and well, you just cant really wear it anymore. After some research turns out the hinge problem is a little too common across the entire world and it was bound to happen. Works perfectly fine still.   
I have the case, aux, usb cable and the airplane headphone adapter that comes with it. 

Official sony service centre quote 6k for hinge replacement and a third party fix(second picture) costs 2k which is for both the sides, holds the hinges in place and also protects the other one from falling apart in the future downside being it won't properly fit in the case. 

I've been using my airpods pro since then but I'd rather get a new pair of headphones as I have a preference. Very confused as to how much should I price them or If I should get them fixed before selling or not. Help a brother out.

I also have a pair of silicone covers for the earcups as these are not sweat-proof or water-proof but for some reason everyone wears them to the gym. I like to proceed with caution. The silicon covers sell for 2k on amazon and are machine washable.

TLDR ; XM5 hinge broke, official repair costs 6k, third party jugaad costs 2k with some caveats. All accessories available with additional silicone covers for the gym. Need advice on pricing.

Also the picture is for reference but very accurate to the damage I'm lazy to click a picture.

Fair Value for Sony WH1000 - XM5