For an example:
1928 st gaudens ms64 vs 1907 st gaudens au58
Au no motto 20 liberty vs Ms motto 20 liberty?
I have a MS-63 1927 saint
Also have a MS-62 1904-S
So that is my answer by my actions.
Favorite part is I paid less then $400 for each of these coins.
Supply -Demand rules.
Coins are for collecting. Forget about "investing". Do the gold coins have any collector demand or are they just more bullion plays?
For collecting, you collect what you like. Period.
For investing...see the 7000 prior threads on the topic.
In general lower grade gold coins in less than VF-30 are not very desirable for collectors. Most gold coin collectors want their coins to grade at least EF-40, unless you are considering a major rarity.
As for the more modern material that was mentioned, advanced collectors are most likely to want the better dates. Usually those collectors want higher grades because they can afford them.
@proventheory ... Welcome aboard. Gold coins are interesting to collect. Usually, high grade low mintage are super expensive... But collector premiums, in many cases, though not always, go down as PM price increases. Cheers, RickO
Thank you everyone for their advice!