Austin piston prices?

[No Signals]

I've come across a box of Austin K3 pistons in a scrap yard (Complete set, NOS, still in original wrapping 1/32nd over), totally outside my knowledge so what should I offer the man? There's no way he'll 'give them away' so there's no point in going in at a fiver but I dont want to be stung. If I manage to get them I'll be putting them on the classifieds so that someone who needs them can have them. Just seems a shame that they are lying there.

[Rhett]

If these pistons are complete with rings, gudgeon pins and circlips (if required),then I would guess £25 each for stock or £50 each for imminent use would be a fair price.