On the other site you said:
(I'm betting they wouldn't be complaining if it was offered as a free download though) Bloody hypocrites!
I said exactly that. Why is that hypocritical? I have downloaded and enjoyed many fan compilations of demos. The creators of that content created and distributed it for free, and there's no reason why the content can't be redistributed.
But taking their content and moving it another medium to try to sell it without their approval is lame.
You had five DVDs listed at 4 GBP each, 20 GBP total, approximately $35 USD right now. There's no way it costs that much to burn five discs and mail them (discs only) to people in your own country. You were offering them for 1 GBP to your friends at the other forum, and you turned down someone else who asked about it and told them to buy it from you on eBay.
That's not something a person does because they're a fan, that's something they do because they want to make a few quid.
If you're just trying to show off what you can do with the Amiga and spreading the word about the talents of demo coders, why not make use of this big distribution center for bits called the Internet? You could spread it around without selling it. Why not do it?