rear main seal

My vehicle is a 2000 RX300 with 75 000miles
I suddenly developed a leak from the rear main seal . Does anyone have any idea what the labour cost is to replace it. Will engine oil stop leak remedy the problem?

The seal its self dosnt cost much. The job is all labor. at a dealership it could be as high as $1000 or more. how many miles and what year. rear main seals are covered 7years or 80,000 miles i belive.