236K miles, 1988 B2200 5-speed. So far starter is still working 99.5% of the time, haven't been unable to start it yet, sometimes just nothing. Last year with same situation I replaced the battery 2 months before its warranty was up, cleaned all battery cables and their connections to starter and to the grounds, shiny metal contact. I tested the ignition switch circuit 20 times, got power to starter all 20.
Right now I'm doing nothing, figure I've got jumper cables, can push start, and also we have AAA.