I agree with the review of The Wet Spot. They have good customer service and I have always had good luck with them. I know other people who have as well. the only issue with an order from them that I know of (a friend got a pleco that didn't survive transit) was handled right away.
AquaBid and eBay are both just sales platforms. You cannot really say either is good or bad. I trust AquaBid more since people are pretty good at reviewing sellers there. With either, just look for a well rated seller and make sure to thoroughly read their policies about DOA fish and whatnot.
I have never used Live Aquaria. I am not impressed by their shipped cost, or their suggested tank sizes so I skip them. I know other people have had good luck though, so I am sure they are decent enough.