About the round one coin: that was a true bargain. I got one myself and I paid significantly more for it. It is in a better condition though.
The coin is a Weisspfennig from Archbishop Friedrich III von Saarwerden, who lived from 1348 to 1414 and was archbishop there from 1370 til his death. At the time, the arch bishop had a significantly more powerful position in society than today, at least when it comes to worldly powers, which is also why he could issue money in his name and why that could be used as legal tender. The coin is made of silver and the mintage is unknown.
Anyway, for the second round coin, my guess will be:
$4.75