Reputable Websites

[Armiyana]

Agree with Morph Market, just be careful about ratings and make sure and don't pay "friends and family" method of paypal - pay the normal transaction way.
...

JKR (forget what the new name is but he rebranded recently)

Kinova is JKR's new branding.

Totally going to 2nd the friends and family paypal. Not only are they trying to get around fees they are required to pay, but you will be forfeiting any ability to get a refund if things go south.

a couple of the breeders I've purchased from on MorphMarket:
Two Snakes One Tub
Maltese Morphs
Wild Side Reptilez
Dragonherp (a bit slow to respond at times but they are serious about backing their animals)

Good experiences all around.