I was told to expect to pay between $300 and $600 for a Featherweight here in the states. You both have great prices for the ones you got!!! I don't know how the prices compute.. Do you?
What years are yours? Mine is 1939. I really think it's neat to have a machine that is older than I am that still runs and runs quietly. Unfortunately, I didn't get the black case with it, but the green/white one that the green/white machines go in. I think that was reflected in the price I paid for it. I got mine from a sewing machine repair shop, so it had been cleaned and oiled when I got it.
I didn't buy it for the case anyway, and got a rolling tote for it to live in when I want to take it with me somewhere.