hdvideodepot has the dr750s-2ch on sale now for $339.99 ($288.99 after discount code). use discount code BLKFRI
for 15% off during the Black Friday sale. It doesn't say when it ends but it's still going on today. no tax except in California. free shipping. The code also seems to work for the power magic pro battery and memory card.
no tax for all states EXCEPT California!