I was rummaging through my world coins collection and found these two intriguing specimens. The first is a Maria Theresa Thaler (MTT) dated 1751 and the second is a Frankfurt Commerative Coin honoring the coronation of Francis I dated 1745. For the MTT coin, I tried to find some information on it at
https://www.theresia.name/en , but they only showed the ones stuck in 1780 including the restrikes.
Now my two questions for these coins are...
1. Based on the condition of these two coins presented in the picture below, how much do you suppose each one would be worth today?
2. What do you suppose the rarity is for these two coins? (ie. Very Common, Somewhat Rare, Only X amount known to exist, etc.)
Any other information on these two coins such as minting location, history, etc. would be greatly appreciated, thanks!

Here are the two coins!
1751 MTT Obverse:

1751 MTT Reverse:

1745 Commerative Coin Obverse:

1745 Commerative Coin Reverse:
