462950 Auction e-store

Hello Sorry about this I have to post it again: I would like to add on my website [login to view URL] or a separate website if easier an auction-buy now e-store for my niche market. I would prefer PRESTASHOP open source or to use Magento or Oscommerce plateform, number of products can be 100 to 1000 to start with , all steps from seller registration for product posting to buyer interface to bid or to buy and final check out Paypal.I would like cross product selling on each product page. I would like to offer 5 ways for the customer to buy or interact 1-Buy now 2-Bid now Auction by posting a bid a certain time with email alert 3-Group now, Join a purchase group to leverage buying power for a certain period of time, so customer X1 would select a quantity Y1 then the customer X2 would do the same and qty Y1 and Y2 would add up and the vendor-seller would post a price 4-Quote now,Get an official quote from the vendor-sellers for a certain X quantity 5-Custom rfq now,Customer to post his requirements to received a quote from the vendor-seller in a certain time matter The vendor-sellers would have a access to hold the product description, images, prices,etc The register vendor-Seller should have a max of 20 products that he can post for free then a monthly fee of X amount.