I'm in contact with TAL to have tickets issued in Sweden for my ex-ARN DONE4. They quoted a 200 SEK (~$27) charge to deliver the tickets to BA's desk at ARN, which I guess is a reasonable amount. Is this consistent with others' experience? The other issue is they need a little lead time to make the delivery (giving me two days to make sure my itinerary is as it should be).

As an alternative, is it possible to purchase the tickets directly from BA's desk at ARN on the day of departure (I believe it needs to be 3 hours before travel), or does it need to be through a travel agent?