I was googling for a local (West Europe) reseller or producer of receiver kits and I stumbled on Conrad, a German based kind of equivalent of Radio Shack. They offer three ultra-cheap regenerative receivers, all in a kit and with a stylish retro case.
The reviews seem enthusiastic on their own website, why shouldn't they? I see a review on Eham:http://www.eham.net/reviews/detail/8197
but the picture doesn't match the ones on the website.
The cheapest kit is a transistor 3.5-9 Mhz regen receiver for only 10 euros. Then a similar receiver for €20 branded "Franzis Verlag 4660", then top of the range is a 3.5-12 Mhz valve tube receiver for €25.
I am really tempted by the valve tube one.
I hope somebody has a direct experience to share.