Software Hut also lists them for under $60 but I typically have to email them to check if they still have something as their web inventory isn't always accurate.
I've sold a few items to more than one person...who've had Amigas for years, who aren't familiar with currently operating retailers.
They don't know there's any retail way to buy stuff any more.
They see something for an Amiga on ebay and figure they should grab it before they can't get it.
...also buying from vesalia.de implies shipping charges from Germany which might make a $60 board cost quite a bit more.
amigakit.com has a U.S. store though...don't know though, never ordered from them.