Whats it worth threads are always tricky. Historically in many cases they end up resulting in a sale and thereby circumvent the sales T&C, as a result the Team have a policy of locking them.
In this case if the emphasis had been different, asking for help / advice regarding the repair, the potential cost and the impact on value then it would likely have been approved. I suggest you raise a separate thread on the issue with this emphasis and you should be fine