$10 coin is those cupro-nickel proof-like coin u mean? those can
buy every Chinese New Year? $5 coin is the scallop shape if m
saying correctly.
actually, that $25 above, if u use it to buy things, it is still
worth $25. The face value is the main point. Its worth more only to
collectors, because, only high prce brings results..
so as said, even the orchid $1 is still $1, no matter how rare it
is, but juat that no one will go and circulate them around

Banana notes, has no face value, but is still worth as a
collector's item, same as Rm1 coins etc although they are no longer
legal tender.