I've got a couple of vintage Flanger pedals that I've just posted on ebay. They both have a starting price of $0.01 with no reserve, but I will consider trades and will end the auctions early for the right deal. If they interest you, please let me know.
The first is a Boss BF-1 Flanger. This is Boss's first Flanger, before they went to the compact pedals, and was made in the late 70's. It's in fantastic shape, except that it's missing one of the feet. There are a couple of repainted or dinged up ones on ebay right now for $150, but there was one that ended in the last week in almost exactly the same condition as this one, and it went for over $250. Below is the link to the auction and one picture. You can check the listing of more pictures and info.
http://cgi.ebay.com/ws/eBayISAPI.dll...MESE:IT&ih=011
The next is an ARION DCF-1 Stereo Digital Chorus/Flanger. It's a pretty sweet pedal and has three different chorus modes and three different Flanger modes with a lot of tonal flexibility. Also, you can use it in mono or stereo. Pretty cool.
http://cgi.ebay.com/ws/eBayISAPI.dll...MESE:IT&ih=012 