Cheap 13 X 70 binos on ebay

I've been looking for a pair of binos for some time, but second hand prices
appear to be inflated by a frisky collectors market.

There are some 13 X 70 Chinese binos on ebay for £45, with some interesting
info and testimonials, including praise from a John Bushell, a name I can
trace to Guildford Astro. Soc.

Some criticisms are published, amongst the testimonials, of the daytime
terrestrial colour reproduction and the long minimum focussing length,
neither of which are particularly relevant to my intended use. I've already
got a decent pair of Zeiss 8 X 30's, which are great for looking at tits out
of my kitchen window, but I want a pair for skywatching. I'm a bit colour
blind, so perfect colour reproduction would be wasted on me, otherwise, my
vision is pretty fantastic for an old Git. I don't wear glasses and have
decent night vision.

Any knowledge/ opinions as to their suitability?

Thanks

Ian