oh…yeh… the doom is here and we all gonna die…
for Nissan, 2005 is actually not the worst year, take it from the guy who used to own Altimas of '96 / '01 / '07 / '12 vintage, and the ones from 2007 and up were the ones with the most painful CVT transmission problems, because they are really of “disposable” quality
2005 is most likely on “classic transmission”, so it will have the regular Nissan’s trouble of the kick when shifting from the first gear to the second, but once you get into the habit of replacing your transmission fluid regularly (like every 20K miles), this is something of lesser concern… if it kicks again, replace the fluid and keep going
the most troublesome issue with 2005 is the disintegration of the first catalytic converter substrate, which gets sucked into the engine and destroys it
so, if your car still works and engine has a good compression, it is under $200 on rockauto for direct-fit:
other than that, it is Nissan, so do not expect it to be trouble-free, but it may be a decent transport for a couple of years if taken care of