We’ve seen this before. 50 packs of Sony DVD media for $19.99 at BB this week. If 4x, -R should be SONY04D1, +R RICOHJPNR01. If 8x, should be SONY08D1 and YUDEN000T02 for - and +R respectively.
http://www.bestbuy.com/site/olspage.jsp?id=1083712187226&skuId=6689167&type=product
http://www.bestbuy.com/site//olspage.jsp?id=1083712187288&skuId=6689292&type=product