I am currently in Canada and bought some world coins from a mixed bucket for .50 CAD (approx .39 USD) each. Here they are:
Doesn't mean it's still not a nice carpet though.... In regards to possible values, you're best bet may be simply to compare to completed ebay listings for coins in similar conditions.
Apparently the 1890 half penny is worth about $20 in the condition it's in. Considering I got it for the Canadian equivalent of 39 US cents, I'll say it was an amazing cherrypick.
I'm afraid you'll find that estimate to be rather high, but either way it's a fine pick up considering the price paid.
Off the top of my head, I believe the Australian coin is not much in AU, although unc has some worth, maybe even 20-30. But that's just retail price guide and probably much lower in the market place. You didn't do bad for 39 cents. The 1890 half penny is great. As said, completed listings on ebay will give you an idea what they go for. I'd imagine 10-15 in that condition. The other coins were good buys but nothing to make a profit over. You did well overall.
