Eggs

Normal Eggs - These Eggs you just have to hatch a certain # to recieve.
Name: Sheep Egg
Cost: 100
Sellback (Normal Variant): 112
Hatches in: 4 Hours
Expires after: 8 Hours

Name: Nature Fairy Egg
Cost: 200
Sellback (Normal Variant): 245
Hatches in: 1 Day
Expires after: 2 Days

Name: Ghosty Ghost Egg
Cost: 400
Sellback (Normal Variant): 550
Hatches in: 4 Days
Expires after: 8 Days

Name: Dolphin Egg
Cost: 300
Sellback (Normal Variant): 330
Hatches in: 10 Hours
Expires after: 20 Hours

Name: Sun Fairy Egg
Cost: 500
Sellback (Normal Variant): 620
Hatches in: 2 Days
Expires after: 4 Days

Name: Owl Egg
Cost: 700
Sellback (Normal Variant): 749
Hatches in: 16 Hours
Expires after: 32 Hours

Name: Shark Egg
Cost: 600
Sellback (Normal Variant): 635
Hatches in: 8 Hours
Expires after: 16 Hours

Name: Flying Snake Egg
Cost: 1,000
Sellback (Normal Variant): 1217
Hatches in: 3 Days
Expires after: 6 Days

Name: Octopus Egg
Cost: 900
Sellback (Normal Variant): 932
Hatches in: 6 Hours
Expires after: 12 Hours

Other Eggs - These need to be unlocked by selling a certain criteria of Egg.

Name: Puff Puff Trio Egg
Cost: 1,000
Sellback (Normal Variant): 1,055
Hatches in: 12 Hours
Expires in: 1 Day

To unlock the Puff Puff Trio Egg, try hatching a Nature Fairy and a Sun Fairy (I think that's how you unlock it, not totally sure.)