I have never bought a frog via the web or from a store that didn't have a healthy frog on display.

The frogs I did have came from a local pet shop that had a nice vivaurum setup and three healthy frogs. I got one from them
and the two others from a local owner that couldn't take care for them.

Sadly I had to also give them up since I couldn't get my wife to take care of the feeding properly.
Since I trave 90% for my job.

Good luck.
Keep us posted