There's a Hotwire list at www.betterbidding.com/index.php?showtopic=92 that's fairly complete and reasonably up-to-date. You'll find sections for both "Toronto (Airport YYZ)" and "Toronto (Mississauga)".
If you're lucky, you may be able to match up the amenities to predict which hotel you get before you commit. (No guarantees, though.)
I would almost never book a 3* on hotwire or priceline. If you go for a 4* you will be happier.
You need a 4 star for sure. There aren't really any 3 star hotels near the airport, most are about 5 - 10 km away.
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