$40 might have been a little low, yeah. Heh. I think ROC got it for $110 or $120? If my memory serves me. All I remember is I kicked myself for not outbidding him, because it's an unusual little item, and I thought it would go for more.
I paid 125USD for the BSP first edition and 155.5USD for the Paget Press edition.
As I wrote above, many years ago (1986?) I bought a BSP first edition of this title that has the black cloth backstrip (as only the Pagets were supposed to have). It was only 20AUD.