For sure that's good advice.
The poster doesns't give any information that would help such as
whether it turns over at all, clicks, or turns slowly. Just based on
age though, if it has near 100K miles, the starter could well be dead
from either the solenoid or worn brushes. If he could find the starter
and tap on it with a hammer or chunck of wood and it started, that
would pretty well convict the starter. If it has that high mileage, I'd
change it on general principles anyway.
And how does this poster know the battery is good? He checked it. Does
that mean that the top is clean? Did he measure the voltage under load.
Don't you get tired of listening to calls for help when people won't