Rosewill RSL-101 Solar Garden Light (10-Pack) for $17.99 shipped after promo code EMCXLVN99.  Here is a screenshot for your reference.  These garden solar lights features 400mAh Ni-Cd AAA rechargeable batteries (included) that are charged during the day with no wiring required.  This works out to be just $1.80 for each solar garden light.