VINYL - Test Pressing of ' Rez + Why Why Why? ' value?

[skruff]

I have come across a test pressing of the 12" Rez (A) and Why Why Why (B), by Underworld, in VG+ audio condition. I was wondering if anyone had any idea how much this would be worth. There is no information online about this to have been sold before - nothing on discogs, ebay etc. The original promo copies sell from around £30 - £90 depending on condition (checked on discogs selling history).

It may not be worth anything at all! But I would be grateful if anyone had any information on its' value.