I tried lubricating the door lock. It's better, but I think that's a temporary fix at best. I'll probably be ponying up $100 for the new lock eventually. Thanks again for the link & info.
I see how to change out the door lock, but I don't see how to pull the striker plate out (at least not without a fight). Is it OK to reuse the striker plate with the new door latch? It doesn't seem like the issue is with the striker plate; all the friction seems to be in the door lock.
2007 Coachman Freelander 26' w/ E-450 6.0 diesel
1982 El Dorado Bermuda 27' w/ E-350 460 gas (sold)