Richard Thorne had a couple on for £4,500: a white '70s one - which looked good and which I think was bought by someone who has subsequently posted on the forum - and a black '80s one, which also looked to be in good condition. They both seem to have gone relatively quickly.
Spiders - and Betas generally - seem to be more highly prized on the continent than here in the UK. Which is good for people who want affordable rarity!
I think the red example Paulb1 has for sale looks great, and I'm sure will be snapped up for the summer.