Blue necklace:  $1.82 (BIN:   $5.79)

Pink necklace:  $1.29 (BIN:  $5.79)

Multicolour gem necklace:  $3 (BIN:  $5.99)

Zara pearl necklace:  $1.75 / $2 (BIN:  $6.95)

All off eBay.