Propshaft - circlips not staked - Good condition - Located in Salisbury - £40

Purchased a propshaft to fit my 1.4 diesel Piaggio Porter and it doesnt fit   

I can take it back to the breakers for a refund most likely but its up for offers if any one needs it.

I paid £40 so quite happy to accept £40, a bargain as the circlip ones seem to be getting hard to find.

Why does it not fit mine - The output shaft on my gearbox does not slide into the prop, also the prop is about 1 inch longer than my original one.

Details.

Prop- length - 630mm.
Shaft extending from shroud - 45mm.
Shaft width entering gearbox - 32mm (approx).
Stampings/Marks

P3
23771X

P15 925

1.4 Diesel Pickup or van out of interest?

I have a van.