I need perfect SEO for my php probid site www.BidLoadz.com

Dear All, I need your help please. my website [login to view URL] is started to go very down in google search results for my keywords such as " sell downloads " or " sell downloads free ". That is why i bought a Seo Mod for my website and installed it. With that mod i can give different descriptions and titles to each url i want. But i have a problem that i have around 3000 duplicate meta descriptions and 2000 duplicate title tags. It is difficult for me to chance all of them one by one manually. It looks like it is a probid bug. It is creating different pages for the same products with same descriptions and titles . Is there a fix to this you have ? I have to solve this problem really urgent, and i want to make sure it wont appear again anytime people add new listings on my website. My main issue is, with the plugin i bought i can chance the descriptions and the titles for the duplicated ones. But main problem at the moment is that as i understand anytime someone adds a new listing then this things will acure again. Please find below 2 examples for duplicating descriptions. While checking the duplicates to give you example, now i also figured out that, as you can see in example 2, when the auction ends and the listing is re-listed. We still have the old one as status closed. I really need a fix or an advice to solve these. Maybe be the system must give different descriptions and titles automatically when there is a duplicate, or i don't know :S Or Google will never love me again. This is the problem i found out and want to solve. but what i also want is your offers for SEO . If you guys are the experts, you must guide me the way. The listings pages of our members must be always 1 page at the top ;) EXAMPLE 1 = Find THE AMERICAN FRUGAL HOUSEWIFE in the eBooks - Food and Wine - American category on Buy & Sell D /100484,auction_id,auction_details /100484,auction_id,auction_friend,option,auction_details /100484,auction_id,item_watch,option,auction_details /THE-AMERICAN-FRUGAL-HOUSEWIFE,name,100484,auction_id,auction_details EXAMPLE 2 = Find HONDA MAGNA VF750C VF 750 C 1994 to 2001 REPAIR MANUAL 223 pages in the eBooks - Computers - Ma /100249,auction_id,auction_details /100262,auction_id,auction_details /100262,auction_id,auction_friend,option,auction_details /100262,auction_id,item_watch,option,auction_details /100287,auction_id,auction_details /100287,auction_id,auction_friend,option,auction_details /100287,auction_id,item_watch,option,auction_details /100324,auction_id,auction_details /100324,auction_id,auction_friend,option,auction_details /100324,auction_id,item_watch,option,auction_details /100354,auction_id,auction_details /100354,auction_id,auction_friend,option,auction_details /100354,auction_id,item_watch,option,auction_details /100488,auction_id,auction_details /100488,auction_id,auction_friend,option,auction_details /100608,auction_id,auction_details /100716,auction_id,auction_details /HONDA-MAGNA-VF750C-VF-750-C-1994-to-2001-REPAIR-MANUAL-223-pages,name,100262,auction_id,auction_details /HONDA-MAGNA-VF750C-VF-750-C-1994-to-2001-REPAIR-MANUAL-223-pages,name,100287,auction_id,auction_details /HONDA-MAGNA-VF750C-VF-750-C-1994-to-2001-REPAIR-MANUAL-223-pages,name,100324,auction_id,auction_details /HONDA-MAGNA-VF750C-VF-750-C-1994-to-2001-REPAIR-MANUAL-223-pages,name,100354,auction_id,auction_details /HONDA-MAGNA-VF750C-VF-750-C-1994-to-2001-REPAIR-MANUAL-223-pages,name,100488,auction_id,auction_details P.S. = I find these duplicates from Google Webmaster Tools & Hostgator's free tool Attracta also . P.S. = If you aren't expert in ProBid + SEO please don't bid and dot waste your or my time. Regards, BidLoadz Admin Hakan