Amazon [amazon.com] has Verbatim 50 GB 6x Blu-ray Double Layer Recordable Disc BD-R DL, 10-Disc Spindle on sale for $ 21.00. Shipping is free with Prime or if you spend $ 35 or more. Ships in 1-4 weeks.
This price is $ 2.15 lower than the front page deal from 4/11.