£10k?!?! It's the worst GTE model by far, in that you'll get wet and the handling is even worse. Mind you, assuming it's on the original tyres, I'd love to take it out - just to see how bad it is hehe
Put some wide, sticky, modern rubber on it, and it'd probably snap in half on the first hard turn
Seriously though, in this market at the moment, think they'll even see £4k? It always seems to me 'classic' Vauxhalls have never commanded huge prices, at least I can't think of any examples that aren't daft like these. I know they have a history of producing stuff you'd rather forget... But had that Astra been a Mk1 R5 Gordini Turbo , or maybe a S1 RST or things along those lines - it wouldn't have be that silly a price... In fact, you could probably sell the S1 RST for more.
Dan