There are eBay auctions, and then there are Totally X-Treme eBay Auctionz! This one is the latter. Just look at that! I have no idea who would need that many Sonic the Hedgehog 3 Happy Meal toys, nor would I have any idea how one came across that many. The price is actually decent: between $20 and $40 depending on bidding or buy it now. Unless you plan to resell the toys to make a profit, or are some crazy conceptual artist who wants to make a sculpture out of these, I see no reason for one to place a bid. Still, they make for a great photo.
Note: despite there being 74 toys, it still is not a complete set. Tails is M.I.A.