Re: Sill replacement or?
Hmmm .... 20 years ago this was an issue and hadn't been addressed ... that problem wouldn't have gotten any better over time.
On the disclosure, seller noted termite damage/sill replacement at time of her purchase (1988).
If you are seriously interested in purchasing the home I recommend bringing in someone other than a termite guy .... perhaps a professional contractor or hire an engineer to provide a more definitve answer.
The other thing may be to put aside the emotional attachment you might have toward the home and realize the homeowner probably realizes there are big dollar structural problems hoping to sell them to you.
It's difficult to say over the internet sight unseen.
"" an ounce of perception -- a pound of obscure "