IMPORTANT: PLEASE READ

How to get at $0.92 per piece for 5 pieces:
Requires 1x $1 item coupon and 1x $2 PayPal cart coupon
(Get the limited PayPal coupons here: http://list.qoo10.sg/gmkt.inc/Special/Special.aspx?sid=12507&banner_no=613847 )
1) Add 5pcs to cart ($6.20) and apply $1 item coupon: $6.20 - $1 = $5.20
2) Apply $2 cart coupon: $5.20 - $2 = $3.20
3) Choose normal mail ($1.40)
4) Total: $3.20 + $1.40 = $4.60
5) Average price per piece: $4.60 / 5 = $0.92

How to get at $1.01 per piece for 20 pieces:
Requires 4x $1 item coupon and 1x $2 cart coupon
1) Add 5pcs to cart ($6.20) and apply $1 item coupon: $6.20 - $1 = $5.20
2) Repeat step (1) 4 times
3) Total cart amount: $5.20 x 4 = $20.80
4) Apply $2 cart coupon: $20.80 - $2 = $18.80
5) Choose normal mail ($1.40)
6) Total: $18.80 + $1.40 = $20.20
7) Average price per piece: $20.20 / 20 = $1.01

How to get at $1.08 per piece for 18 pieces:
Requires 2x $1 item coupon and 1x $2 cart coupon
1) Add 9pcs to cart ($11) and apply $1 item coupon: $11 - $1 = $10
2) Repeat step (1) 2 times
3) Total cart amount: $10 x 2 = $20
4) Apply $2 cart coupon: $20 - $2 = $18
5) Choose normal mail ($1.40)
6) Total: $18 + $1.40 = $19.40
7) Average price per piece: $19.40 / 18 = $1.08