Click on my user info, recent posts #7. I have a few of my date codes posted.
My Z is an O4D, 302: 0423
Your car of interest: 04A 302: 0329
All the previous posts on this thread are correct so I'm not quoting.
Bottom line is your plans for it, along with pocket depth. IMO, based on pics (what is just on the surface), priced high, plus it's been on the market for awhile. Buddies may be bidding it up. But, if numbers check,(big in the plus column) it is a 68 Z. Investment probably a poor choice of words, but car worth keeping if done properly, with a reasonable initial purchase price.
POP ? rather have the car then visa versa, it may pop up(no pun)