Been quoted £675 for gearbox/diff bearing replacement

[shotta287]

Hi all,
Unusually, my 2009 Audi A3 (manual) has been diagnosed with gearbox/diff bearing noise. Originally a garage thought it was wheel bearings but they referred me to Driver Transmissions in Birmingham who have quoted me £675 to strip the gearbox and replace the bearing(s). What do people think? Is this a reasonable price? And can anyone recommend any more transmission specialists in Birmingham?
Thanks in advance.

[Fort Jefferson]

Is this price for them taking the box out, and putting it back in, as well as repairing it?