I think there's real differences in the food that's available to use Europeans compared to the States.
For me fish (for human consumption) is easy to get hold of, we can get good quality fish easily - tilapia, which seems to be a favourite in the US, is expensive here though (around £25/kg); Scottish salmon fillets are about half the cost of tilapia; we are also trying hake, which is half the cost of salmon.
Feeder fish don't seem to be easy to come by, use of feeder fish in the UK is not technically illegal but it's a grey area that is frowned upon.
Pinkies are really easy to find, we have two shops within a 10 minute drive that sell them frozen. The best price being £2.50 for 10, which is better than buying online when you factor in the postage.
Worms... I've not found anywhere locally, but there must be a fishing shop around. I'll ask a friend who fishes. There are places to buy them online, but I'm not 100% sure they aren't red wrigglers.

I just find it interesting to compare the availability of different foods.