aaddpp

I took some photos of my exhaust valves as part of my documenting process, and noticed that one valve stem seal has what looks to be some oil seeping from it. Two others don't show the same seeping, but seem to have some residual oil on the seal and some "wetness" down the valve stem.

This is outside of my scope of knowledge, so I was wondering if you could offer an opinion on what the photos show as well as whether the internals of these valves will need to be replaced. FWIW, the heads are still on the car, so I don't have a measurement of the valve guide wear yet, but should over the next week as time permits.

Note: Last two photos are of exhaust valves that don't seem to show any leaks.

Thanks!
Dave