The Bissell Little Green Multi-Purpose Portable Carpet and Upholstery Cleaner is on sale for $81, a 34% discount from its normal price of $124.Over 100,000 of these machines were sold in the last month alone.It has earned an astounding 68,000-plus five-star ratings from Amazon shoppers.The portable carpet cleaner uses hot water and stain-fighting cleaner to lift and remove all kinds of messes.