Horimono looks a little worn, possibly Koto?, dunno.
Cant see any way of repairing the ito, which is a shame, as new ito on an antique koshirae does not have the same appeal. New ito $150.
You might want polish, not sure what that costs your end, not cheap
Usually with old saya and new polish, would recommend shirasaya made to store the blade, $300 upwards.
If hes asking $2000, im guessing hes had it valued. If he doesn't want to sell, maybe hes asking an high price?
I would aim low or not bother. At that price there is just too much about, in perfect polish and without secrets.
Good luck.