Guys, you're thinking of this one - the one they call "the classic"?

[Linked Image from tensorlamp.com]

It's like US$40 [Linked Image]

Yeah, I've seen these in junk stores occasionally for a few bucks but always pass up on them because there's never a bulb to test them to check out the condition of the transformer.

Mine are older, more sedate versions of this much cheaper thing also from Tensor (picture the above version with a gooseneck and a flat metal base with a slide switch):

[Linked Image from tensorlamp.com]

This is the one that uses the 120 volt 40 watt appliance bulb.

The other one is probably more expensive because of the transformer lodged in the base of the lamp.

That's probably the most expensive part of the whole thing I guess. And it's "retro" [Linked Image]