Not sure what size they were but you probably didn't miss anything, 015 X 70's are $15.99 retail from Brodak and some dealers will give a little discount..
http://www.brodak.com/shop_productdetail.php?ProductID=6020He did what is called a snipe, if you are going to go after much on eBay you might want to first check and see what you can buy the item for from a dealer or mail order. Often things go for more than retail on the Bay simply because two people get caught up in a bidding war and loose track of common sense.
Second check out some of the auto snipe sites.. (Goggle eBay and Snipe), learn how to set up an automatic snipe. It is the best way to get what you are after for the best price.
Couple other items worth noting, check the sellers shipping costs and make sure you include the shipping in whatever you decide your max is for the item. Once you have your max, set up a snipe for that amount less shipping. If you win great, if not don't worry, the other guy paid too much and another one will come along that might well be a better deal.