We check out whether or not revenue-maximizing auctioneers promoting heterogeneous gadgets will permit for combinatorial bidding withinside the presence of auctioneer opposition. We evaluate the selection of public sale layout with the aid of using competing auctioneers with that of a unmarried auctioneer. Bidders are heterogeneous of their demands, with a few having synergies for gadgets. We discover that, even supposing a unmarried auctioneer gives a combinatorial public sale, competing auctioneers in a similar putting will not. Instead, the competing auctioneers will phase the marketplace with the aid of using limiting allowable package deal bids so that it will growth opposition among bidders. This indicates that it won’t be high quality for a web marketplace platform to provide combinatorial auctions as a layout choice to competing auctioneers.