Not quite at the $40 point yet John, but I do think my days of buying top flight Arai's or AGV's may well be over, barring a Lottery win. Like you I'd rather find a bargain so I seek out last years models of named manufacturers and usually get a handsome discount. My last bargain-bin lid was a £200 HJC which I secured for £99. That'll do me thank you very much.
(Like you Stig, I have a big 'ead, so my size is often one of the ones left on the shelf...)