Presale for Las Vegas?

Has anyone ever bought tickets to a show at the MGM Grand? I am concerned about not being able to use ticketmaster, as I am buying the tickets from Canada. Also, I have looked at the pricing for some of the other shows at the MGM, and it seems more costly than an arena show. $400 for a single Rolling Stones ticket, $200 for Jimmy Buffett, etc.
I was originally going to fly to Seattle, but then I figured, why not just make a vacation out of it, and see them in Vegas, for only a little bit more money?
And of course, I am unsure if there's still going to be a pre-sale through AEG for Vegas. All I know from BJ.com is that Vegas tickets go on sale Sat, Oct 29th.