When I read about the oil leak, I knew that these valve covers are notorious for leaking and I figured it was worth the chance anyway. If I had to pay a shop to do the work maybe not. But I do all my own mechanic work so, cheap part, and some time.
The car has been driven weekly since new, has never been just parked. And with 45k miles the rear main seal is not a likely candidate for the leak. What I will have to look for is sludge in the engine. The previous owner just used it to run weekly errands so if he did short trips and didn't bring the engine up to operating temp for long enough periods, there could be some condensation sludge in the motor. But I know how to take care of that.