Unless it's really REALLY a bad leak I'd live with it. You might also try a "seal sweller" but really on this type of seal I doubt it will work very well---but you never know.
Given the high miles, even if you replace the main seal, it's possible that you have lateral play in the crankshaft at 200K miles and a new seal may not hold. So all that expense may not prove to be the solution after all.
I'd only fix it if it were a very serious drip drip drip like a leaky faucet. If you only get a small spot of oil on the floor, and your oil level isn't dropping noticeably, i'd leave it alone.