Special closet-cleaner offer for US customers: any THREE normal back issues (3, 5, 7, 9, 11, 12, 14, 14, 15, 16) can be yours for $15 postpaid. Or get a selection of older Scrams (3, 5, 6, 7, 9, 11, 12, 13, 14, 15) and get a crash course in unpopular culture. US readers pay $50 for the back issue selection.
Subscriptions are for $22 for four issues (US) and can begin retroactively starting with #16. So you could conceivably subscribe today, get issues 16-19 and a free premium (when available), and your sub would immediately lapse. If choosing to start with anything but the current issue, just say which issue you want to start with when you send your order.
Visit the Scram site to subscribe or order back issues.