Originally Posted by RichardInSF
I know it's somewhat untypical in Sweden, but does it happen that people might go to the ticket machine and ask who wants to pair up with them to get the 100SEK price instead of the 190SEK price?
Sure it happens all the time. You just have to sit near each other. Students pay only 100SEK all the time with proper ID and therefore may need to offer to let them pay only 80SEK.
Works very well if there is a long line at the ticket window and the train is going to leave soon and you can buy the ticket with card in machine.
With the drop in Taxi usage in the summer several of the main ones are offering promotional rates.
I beleive Taxi Kurir (+46 8 30 00 00 )had the best when I was there a couple a weeks ago with a fare of 340SEK ARL - City Centre and some of the others have less expensive inbound versus outbound.
From the Continental you are just as well anyway with the Arlanda Express as it is right accross the street but some others who need to transfer to the city terminal might opt for taxi.