You can always make purchases for IJ items at the InsaneJournal Payment Center (http://www.insanejournal.com/pay/) . However, Perm accounts only go on sale at certain times of the year and I believe the next sale of that specific type of account is in November or December at a reduced price (I think the last time was $35?). I think the regular price is $50? (It could also be $150, but I might be getting that confused with LiveJournal or Dreamwidth lol)