Metro's, Maestro's specially Turbo ones and Montegos.
All now are worth a lot more than a few years ago.
And thats not even talking about Minis, looked for a cheap one for the grand son, all over a £1000, and rust buckets that need a bit of TLC, as they say in the ads.
One of the daughters bought a proper Mini Cooper about 10 years ago for £3000. Now its worth the same or more. Admittedly they have spent a few £££'s on sorting rust, subframes etc, but all do-able.
So I reckon a few more years and good Zed range cars will be worth more, specially if in Yellow.