I have posted an assortment of items on Craig List including

NEW and used RRD bars, Royal, BEST, Cabrinha, WIpika bars, etc.

Some of these bars are older and could easily be upgraded with new QR device (e.g. from Switch Kites for under $50). There are also a few items that might be good for someone building their own bar ad needing various components. If you consider that a new set of lines can cost easily over $100 there is some value in even some of these older bars

for details and photos see
http://muskegon.craigslist.org/spo/4721358799.html

I also have a few good kites for sale which you can link to from the page address above