As one of its daily deals, DiscountMags offers a Martha Stewart Living Magazine 1-Year Subscription (10 issues) for $20. Coupon code "DEALNEWS" cuts it to $9.99. That's the lowest price we could find by $12, although we saw it for free three weeks ago. Deal ends today.
Of note, you can purchase up to a 4-year subscription at this per-year rate.