I see you have sessions ability already, but as of yet are keeping the code.  I am currently adaping eAuction for a single-seller, multiple bidder system.  Today, according to my abilities, I will implement a server-side state/session mechanism for persistent login information and only allow and show the new post link when the admin is logged in.  I also changed the registration fields allowed, and added a terms and conditions that one must accept with a checkbox before successful user registration...  I also find the task of adding 40 categories (cities) with 20 items(tickets) each a bit daunting...  After this, I will need to see how I can cancel a bid, limit bidders to a max of being the high bidder on two items, and possibly import some others' scripts hacks for a "for dummies" deletion method, as I will hopefully pass on the maintenence responsibility to somebody else.  eAuction is a good base to start with, although I found it and all the free auction softwares lacking.  I never even saw a commercial package that is set up for a single seller/multiple user-bidder system or that advertised that capability, so a free system plus my time and effort is probably the only way to go.  I can only imagine that the above hacks will just slow down a (n auction) system that has decent, but certainly not mind-blowing speeds.  On a Dual UltraSPARC-II 450MHz with 2Gb ram running FreeBSD/sparc64, it can serve about 4 concurrent requests per second...

Anyway, any suggestions or comments would be helpful, and I do thank you for bringing eAuction to its current state.

hey!  I'm not changing it into a shopping cart...  If that's what I wanted, I would have a large amount of choices...  My boss wanted me to give/make him a system where they can auction off certain concert stage-seating tickets...  they want bidding and competition, not a set price...  so I'm keeping the auction part intact...but I dont want anybody else to sell their stuff on the site...
I hope this makes more sense.

To explain in a more detailed fasion what you asked me to,
I need administrative control over what the users do...  I need to be able to cancel a bid if I want...
I also need to limit the number of items(in this case, concert tickets) somebody can be the high bidder on at once, to prevent brokers from obtaining more than their share.

We are going to sell 20 tickets per city in 40 or so cities...  so for a category, I will put a city, and under each item under that city, a ticket will be there...  40*20 == lots of user input.  The auction might be over before i'm done entering them in.