I somewhat agree with GBELEC bit I think he may be a little high on his values. In my opinion because of the condition, the shinplaster might be worth 8 or 9 dollars at the most. The 1973 Dollars, because there were Billions produced are not hard to find in uncirculated condition are probable worth ...

It's not just the writing, the bill has been folded twice creating three fold lines. If this was in uncirculated condition, it would be worth five figures.

It can't be rust showing. Those cores are made of brass plated aluminum bronze, neither of which can rust.
It just must be the chemical reaction.

It shouldn't hurt the collector value of the currency and they can always be returned to the bank for face value, it is just that they are no longer legal tender.

Pretty common. There were 12 million printed and I wold bet most of them are Uncirculated as people were hoarding them hoping they would increase in value.

The MM is the two letter prefix. It can be a combination of any two letters.
The asterisk denotes that what you have a is a replacement note.

A picture would help

I agree, that note is certainly not rare and in that condition, you might as well deposit it at the bank as it will never be worth more than a dollar.

The AA are just the prefix letters, they can be any combination of two letters.
What you do have which can be identified by the asterisk is that it is what is known as a replacement note.
There were 800,000 of this prefix printed and it does have a slight premium over a normal note.

Your mostly right in your assessment.
Misaligned Die
Chips on ELIZABETH and CNA (With that many, you could probably call them accumulations.)
Not a cud above ETH II, a cud involves a break in the rim.

Hard to tell what the significance is unless you were there when they were added. Possibly someone's initials.
It didn't leave the mint that way so it is PMD

Welcome to Coins and Canada In the future, please crop your photos to enlarge them , we don't need to see all that background. When pictures are that small, it is hard to see the detail. From what I can see, it looks like a SF Near variety. In that condition with the missing plating and scratches, i...

Why do you think a common dime is worth more than face value and why would you want to spend around $15.00 getting it certified?

Welcome to Coins and Canada What you have is the 1954 "Devils Face" portrait which in itself is worth a premium. Value depends on condition and it is hard to determine condition of paper money from a photo. If it is in uncirculated condition, it could be worth a couple of hundred dollars. One thing,...

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Nothing special there. Value in that condition is one dollar.