Purchase Avios now. Get a bonus of up to 25%. The more Avios you purchase between 15 February and 28 March 2013, the bigger the bonus you get – up to 25%. Why wait for that reward? Purchase 5,000 - 23,000 Avios and receive 15% bonus Avios Purchase 24,000 Avios, your full annual allowance and get 25% bonus Avios Cost to purchase 24k+6k for full 30k offer is $685. Seems like it's not worth it to me as that is only enough for a decent domestic RT which only cost that much plus you don't earn the miles in the process. I guess if you need enough to put you over the top on a big redemption it might be worth it.