There's one For Sale now; some pictures below of it and another.
They say the idea was to fit this basic body so they could sell the car for under £1000, then the purchaser would have a coachbuilder design and fit a body to suit him. I wonder how many did?!
Possibly more than you think!
Around the time we are dealing with, Purchase tax on passenger cars was levied at 33.33% of the basic price. If that price were £1000 or over Purchase tax was doubled to 66.67% - however if there were Purchase Tax on the coachbuilder's subsequent work and I'm not sure that would have been, it would have been at 33.33%.
Somewhere I've seen that the Elliott bodied Healey cost £2725 inc. PT, so the basic price would have been circa £1650