Then you have looked at the wrong registrars. Loopia[1], Binero[2] and Crystone[3] all sell .se domains for around $15. (I'm not affiliated with any of these companies),

[1]https://www.loopia.com/domainnames/#prices [2]http://www.binero.se/doman [3]http://www.crystone.com/domainname.aspx