Green gem necklace:  $4.06 (BIN:  $13.49)

Blue rhinestone collar:  $2.06 

ASOS bug necklace:  $.64 

Pink/white flower necklace:  $1.36 (BIN:  $3.85)

Green leaf necklace:  $1.76

Blue flower necklace:  $2.06

Glittery cascading necklace:  $1.29

Blue stone necklace:  $1.66

Floral necklace:  $1.76

Spiked gem necklace:  $1.66

J.Crew factory butterfly petal necklace dupe:  $1.54 (BIN:  $3.99)

Chain necklace:  $2.30 (Highest:  $3.85)

Lion necklace:  $1.76 (Highest:  $7.99)

Black leaf necklace:  $1.06 (BIN:  $3.97) 

Blue gem necklace:  $1.29

Multicolour gem necklace:  $1.56

All off eBay.

I wish I didn't buy most of the ones from that one seller in the middle.  They were a lot worse than expected!  That seller's pretty hit and miss.  This one was the best one though, it was $2.06:

I'm happiest about the first necklace.  I wish I could have gotten it for a bit less though, since I've seen it go for about $4.30 on aliexpress.

Here's the original J.Crew necklace:

It retailed for $56.50!