does anyone know what these are?

http://www.trademe.co.nz/antiques-collectables/coins/other/auction-1022621975.htm

Lots of token in Italian (Conservatemi vi saro utile)... except one Czech coin, maybe a demonetized coin under the koruna (maybe 50 heller)

Do you know if they're actually silver. The guy has listed them as silver, but I doubt they are, they certainly don't look silver.

Czech 50 heller is aluminium for sure. Even confusing (but low chances) with another coin, it would remain aluminium or (if higher value) only nickel-clad iron...

And for tokens, not sure, but probably similar weight, so all aluminium or iron-based. No interest except telling the seller he says bullshit

50 heller for sure: no equivalent obverse inside CZ.
https://en.numista.com/catalogue/pieces2156.html

Indeed, all the higher denominations of the Czech coins have a totally different obverse so that coin is certainly not silver. And I doubt very much that the others are silver. And they certainly aren't "ancient".
So if I was you, I wouldn't even consider to buy these "coins" for that price.

Yeah, I was pretty sure that was the case. I was just checking on the off-chance that they actually were silver