Hard to say for sure. I was fortunate enough to get two directly from Les years ago. I ordered another one later on that I never received, so personally I'd have to go with priceless, since there's no way I'd ever part with either of 'em now.
To answer your question though, it would really depend on being able to find one up for sale, the asking price, and how much one would be willing to pay for it. I believe I paid $75 for the painted head and $30 for the unpainted one. I imagine they'd go for considerably more now though, since they're so hard to find these days.