Can I interest anyone in a Sony 500mm F8 reflex lens, it's an A-mount.

I've used it on my A6000 with the LAEA4 adapter which was used to take the sample shots below (click through for hi-res versions).

Selling because I have a Sigma 150-600 and have just bought the SEL70350G, so this one is now sitting in its box unused.

Comes in the original box, with the leather lens-cap and the ND filter.

Hoping to get $400 for it.  Can ship NZ wide for $10 or arrange pick-up in Whitby or Wellington CBD.