Amazon has the Singer ProSeries 54301 Thread Conditioner Wax (Clear) for $2.99 - $0.30 off coupon (check "Apply $0.30 coupon") = $2.69 with free shipping on $35+ or with Prime. Includes 5 mini beeswax with individual plastic holders. 

• Also on sale: 50ct SINGER Safety Pins for $1.61