I have had a pair for 4 years now. They are one of my favorite tree frogs with lots of character and oh so freakin cute!
The ones sold are always WC there is no one known that had ever bred them I don't think. I tried to a few months ago as my female is gravid but nothing ever came of it.
If you can find some I'd definitely go with these! Superior to the other ones you want.

Not really sure what to compare them to care wise. They are from a mountainous area in the wild, not at the peak though more in the middle in a forest. I did a lot of research on the area where they live. The temperatures are on the cooler side, throughout the year range from 20 C to 25 C (68 F to 77 F) They should never exceed 25 C. So average room temperature with a 13w 5% UVB compact bulb on them is enough, focus on keeping them cooler rather than warmer.
You can either keep them on eco earth substrate as they sometimes burrow, or you can keep them on a reptile carpet or similar. I have kept them on both with no problems. They like a large water dish/area. Moderately mist them at night when the lights go out. They don't like it directly on them though so try and avoid them while misting. Humidity I would say maybe around 60%? I have never found a hygrometer that works correctly so I gave up on them, misting them once or twice a day is enough. They like a lot of space so the bigger the terrarium you can get the better, they are extremely active bouncing and climbing around all night so will make use of all the space you give them. I have 2 in a exo terra 18x18x24. Try and get as many as you can afford as being WC sometimes some of them unfortunately don't make it. If you have questions you can PM me. I have alot of pictures and some videos of them on instagram. http://instagram.com/the_frog_keeper#