Casper too expensive? This memory foam mattress alternative from Walmart is up to $170 off.

With daylight saving time this past weekend and National Sleep Awareness Week starting today, retailers have yet another excuse to have a mattress sale.But 10% off a $1,000 Casper mattress isn't a good enough sale for some, especially those who are ultra weary of the whole "mattress in a box" trend.Lucid is a great budget alternative to Casper, and the best-selling 10-inch gel memory foam mattress is up to $170 (35%) off today. Walmart has your back -- literally.SEE ALSO: Bedding sales to help y