There will also be a special Black Friday deal for PlayStation Plus at select retailers nationwide. Pick up 1 year of PS Plus for only $29.99* — that’s 40% off the regular price of $49.99. With PS Plus, you’ll get new games every month with Instant Game Collection. You’ll also get access to online multiplayer on the PS4 system. Best of all, one membership will cover you across your PS4, PS3, and PS Vita… for just $29.99* on Black Friday only.
*Limit 2 per person, per purchase. Offer valid 11/29/13 only, while supplies last."
That "buy now" button is probably always there.