Obviously some bargains to be had.
The fact is, that particular 75 is now 10 years old, and most people these days can afford and want something newer. The age is, I think, also somewhat exagerated by the fact that the car has an old style reg plate with a 'Y' year marker rather than the newer style two letter, two number, three letter system that we are now all familiar with.
This also explains why a certain other club now seems to be full of boy racers with MG ZTs - they are affordable to the younger generation and readily available.*
* please note - I am not 'knocking' another club on this forum - just expressing an observation