I want to bid on three auctions. All three auctions are by the same seller ending at the exact same time. Can sniper bid on all three of these auctions for me?

Yes, it can. First,look at the eBay listings (let's call them A, B, and C) and take the one that's lowest on the page. That one (A) was the first item put up and you should bid on it first. The one highest on the page was put up last (C), and the one in the middle (B) was put up in the middle. This is important for sequencing your bids. Set up three bids at intervals (I suggest 5 seconds) starting with 15 seconds for the first item (A), 10 seconds for the second item (B), and 5 seconds for the third item (C). This will let you bid on all three within 15 seconds with little fear of anyone getting in an opposing bid. (Although that is always possible, particularly if your opponent is also using AS.)

Keep in mind that you are setting up three separate snipes so you may lose one or more of them if there are bids higher than yours. Bid one-third of the largest amount you're willing to spend on each one. Of course, if one of them is more important to you, then weight that bid more heavily.

Let us know how it comes out, willya?