OK, here are the easy ones:

"Hopkin Frog, Hopkin Frog, where have you been?"
"I've been to eBay to bring in the green."
"Hopkin Frog, Hopkin Frog, what did you there?"
"I found a buyer, my story to share."

(I could follow up, but, nah, I don't think so.)

Oh, where, oh where has my little frog gone?
Oh where, oh where can he be?
With his eBay price set short and his legend writ long,
Alas for his poor family!

(Hmm. I'll have to give this song challenge more time.) :D