Hello, I'm Jason. I will do my best to answer your question quickly and accurately using the information you have provided.
Ok, so manual transmission. Push clutch in, but cannot shift into gear, correct?
And the brake fluid level has not dropped?
no it is at max
Ok, this is unfortunately going to require transmission removal, as it sounds like there is a mechanical failure. Possible damage release bearing or pressure plate
how many miles on the car, and is it on the original clutch?
third owner and about 130k
ok, so you may not have clutch replacement history information
not likely to be a slave cylinder?
with the fluid level staying constant, that is extremely unlikely. Easy enough to remove/inspect/replace, but it's very doubtful that it's failed
I can shift gears while it is off
Yes, that makes sense. That can be done in practically any manual transmission car with the engine off, and clutch not depressed
so what is it not doing as far as you are consern
The pressure plate is not releasing the clutch disc completely when you step on the clutch pedal, either due to a failed throwout bearing or broken pressure plate
is this common
on a car with these miles, if the clutch assembly is original, yes, common
what parts are needed for this repair
Clutch kit, which will include the clutch disc, throwout bearing and pressure plate
not good, no other options huh
if both cylinders are holding fluid, unfortunately not
believe me, I understand that this wasn't the answer you were hoping for, but it's my duty to be as truthful as possible here, with the information I have
so, I suppose I ask that you please not shoot the messenger