I am interested in buying a used Bosch Nexxt 500 washer and dryer pair. I had a look at them the other day and both are very clean and well taken care of. There are absolutely no signs of mold in the washer. The only problem is that the washer's door is sagging and difficult to close (basically needs to be lifted and pushed pretty hard). I know this is a fairly common problem with these machines.

Does anyone know if it is fixable and approximate cost of such a repair?