Tiergrade via Amazon offers its Tiergrade Push-Pin Magnet 60-Pack for $14.99. Coupon code "GXV8UILZ" cuts that to $7.99. Plus, Prime members receive free shipping. That's tied with our mention from three weeks ago as the lowest price we've seen. (It's the best today by $10.) Each magnet can pin up to 11 sheets of paper to any magnetic surface. Deal ends November 30.