Gixen Auction Sniper for Safari. This will allow you to Snipe Auctions on eBay though Gixen.com Free Auction Sniping Service with Autosnipe
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Reviews
Gixen is the bomb
5
By NillaGoon
This extension is pretty simple, but the service behind it, Gixen, is an Internet treasure. I've used it for years, always with great results.
Gixen is entirely free, but you can sign up for redundant sniping servers for a few bucks to support them.