Cortez model No. C-304

Hello,

Hoping it is fine that I post such a question here....

I have a guitar that's been in the family since somewhere between 1985-1990. It is in a very good condition and was once told it is a pretty decent acoustic guitar. So my question to you knowledgeable people: how good is this guitar and how much would it be worth? I'm just looking to have an idea... (5$. 50$. 500$???)

- Cortez
- there a big "sticker" inside saying "model No. C-304"
- we own since mid-late 1980s (brand new)

I am usually pretty good at find such information googling it, but no luck this time around.

Thanks in advance!
Tgo