You can often find unopened or barely used products like all-purpose cleaners, laundry detergent, window cleaners, and dish detergent - all for a fraction of the cost of buying new.
A pack of antibacterial paper soap sheets that will seriously come in handy when the public restroom you're using is out of that mysterious pink sludge they call soap. Just pull out a sheet, wet it, then get to lathering. Your back will be so grateful your hand is clean and germ-free while you're patting it.