I get the Vexilar newsletter and the current issue had this link to shop for their their factory reconditioned units. They say that some of these units aren't available anymore so if there is a model you like that you can't get any more, it may be available here.
I didn't do any research on current prices to see if these are good deals because I already own Marcum units, but I figured I'd thow it out for those looking for a flasher.
My building is a little chilly this morning and I can feel the lakes starting to freeze. Better get ready...