Stopped at Best Buy tonight and 50-packs of Memorex 8x DVD-R were on clearance for $8.99. This appears to be a nationwide clearance that started on the morning of May 11.
The pack I bought contains CMCMAGAE1, and they appear to be of good quality. A quality scan is attached below.
Some warnings: Memorex 16x media is regular-priced. Not all stores will have 8x -R media still in stock. Memorex 8x +R media should be priced differently. There may not be a price tag on the shelf. You may have to look around the store in the video department and overstock areas for these discs.
Memorex part 32025597.
Best Buy SKU 6678589.