Newegg has 15 packs of Memorex 25GB 6X BD-R Blu-ray discs on sale for $8.25 with promo code EMCPHHC45. There's also a $5 mail-in rebate that drops the price down to $3.25. Shipping is free.
memorex 25GB 6X BD-R 15 Packs Spindle Blu-ray Recordable Media Model 98683
Rebate form: http://images10.newegg.com/uploadfilesf ... 4HN82A.pdf