Bought my truck at Michener Allen auctions. Got a good deal and will look there again for my next one. They prefer to have a big sale once a month and go early as thats when the best deals go through.
I went to the presale viewings the day before and made a list of trucks I was interested in, noted their VIN's and did a quick Carfax report to check for major stuff.
you can sign out keys to inspect a little closer.
http://www.maauctions.com/calgary.aspx
I didn't care for Regal but they have regular sales and the prices are decent if you are good at on the spot inspections.