Need help with differential oil leak fix
 

Hello,

There is some oil leaking from one of the axle shafts coming out of the rear differential of my 2015 BRZ. I got it inspected by a Subaru dealership, they think replacing the seals should fix the leak, however they would be charging ~$500 for parts and labor.

Is this quote reasonable? Has anyone here had to work on their differential or knows of any good mechanic or auto shop(s) in East Massachusetts that can help fix this?

Thanks in advance!