That's really weird. I've used SWREG for numerous purchases, many of them with Anton and I've never run into this problem. Yes, I see and disable the extended download option and only get tagged with additional fees if I use my paypal account to put it through. When I run it with the credit/debit card I never get hit with extras beyond the listed price.

Now as far as tax being included or not included in offline transactions (at the store for example) I live in Ohio and with the exception of see more food, it's just a common practice for us to pay the listed price plus tax that is added at the register. For example: If I buy a $10.00 Video at Wal-Mart I know it'll be $10.65 when I get to the register because of the 6.5% sales tax. Not sure how other places, such as Germany, do it. Online I never get hit with sales tax as an additional part of the transaction, I'd just walk on that.