Not really sure if there's anything to about it, but I'll give it a go.
Could there be an implimentation to let us change karazhan rings for coins? I was being ganked yesterday by Alliance outside of the raid instance, and mistakenly clicked the wrong ring quest while trying not to die. This resulted in me getting the wrong ring. After making a ticket about it I was told that this is not something they help with (and I also know its possible to change it at Exhalted).
But I'd be willing to pay coins for help in this area. I find it kinda frustrating as a lot of raiders look to your kara ring to reference if you've raided karazhan before, to let you join pugs.
You are stuck with that ring until exalted (you get a more powerful version with each new reputation level). Once you hit exalted you can pay a fee ingame to exchange it to another one. In a nutshell there is no reason to pay some bucks for that instead of buying something you really need. Not to mention that ring can be replaced with any of the t6 content rings.