For anyone searching for an electric burner, the one which was a QVC TSV is currently available on Yankee Doodle and yankee.co.uk for £23.99. It is called Astbury and has a removable top. I have one and think it is very nice.
I looked at it yesterday, and the astbury wasn't the teapot. The teapot burner wasn't an electric one, and was £14.99. I prefer the astbury, as the removable tray means any melt can be used, with the tsv, you will really need to buy the jar melts, as they will need to be removed in situ. Most people won't be able to put the entire burner/safety in the freezer to make the melt easier to clean off.