That's a lot of money to spend, with no guarantee the items will actually show up. I see the seller doesn't take a credit card (they prefer a wire transfer -- big red flag!), so you have little recourse if they skip town with your money.
As to the items, they look pretty. The coins are not that fabulous. The entire set of acylic proof sets is probably worth about $500. You can see that the stacks of bills are not of like items (see where the stack with the $5 on top, where the design on the bills below it are clearly NOT that of a $5 bill -- you might as well consider that all the bills you can't see are just ones). Some of the notes pulled out and highlighted are worth more than face value, but most of them are not worth but just a few bucks over face value.
The circulated coins, especially the foreign ones, aren't worth much at all. They are fun to look at, study, and explore, though! As a kid, I loved trying to interpret the foreign words on foreign coins, and figure out what countries they came from, without looking anything up. As to the domestic circulated coins, unless there's something extremely rare in there, you won't have much. And bear in mind that coins are not solid silver or solid gold, as they would be too soft to survive the rigors of being a coin. The Peace and Morgan dollars are about 90% silver and 10% copper, for a melt value of about $25 per coin. Assuming, of course, the coin isn't valuable because of its rarity.
Good luck!
