The following "chipdeals" auction runs thru Wed evening, but it DOES show the "not a registered user" tag. How does an un-registered user conduct an auction?
(This question is not directed specifically at Rene as seller, but asking it generally about ANY seller -- or buyer -- that's no longer a registered user.)

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1128752388