Someone once told me that if you're hard up (and who isn't?), always go to sales at closing time. There are two good reasons for this: First, you never know what you missed, and second, prices plummet.
I went to an annual flea market last Saturday as the stall holders were packing up and got this Burr. Stefan Isler 'Lava Flow' for $20 reduced from $35. The main flower spike is a whopping 2' long!
The only downside was that it was potted in a horrible, compacted and moldy muck, but it's now attached to a tree, where I hope it will thrive.