Sorry you had to find us, but welcome to the forum anyway.
High markers do not really indicate the stage. How fast they drop post op gives some indication, failure to drop much at all generally means there is still cancer that has spread beyond the testicle.
Some guys do drop to normal with high markers. There is a specified half life that they look for, have they drawn more blood yet?
Both Chemo & RPLND are still a possibility, but impossible to guess at this point. It will depend greatly on the path report, how fast your markers drop & even which doc you are seeing.
Jan, 1975: Right I/O, followed by RPLND
Dec, 2009: Left I/O, followed by 3xBEP