It's an unprecedented offer from Sam's Club this Friday through Sunday. Get all the benefits of a membership without paying anything extra. Normally, non-members have to pay a 10 percent surcharge on all purchases but not this weekend.

It's a good opportunity to see if you think the deals are good enough without commiting to a membership. Still, even if you decide after joining that the $40 or $100 membership isn't worth it, you can always get a full refund.

Should you buy the Advantage Plus membership for $100 rather than the $40 level? Check out my Dollars & Sense article on Tuesday. If the article changes your mind and you feel as if you need to know while you're in the store, go for the $40 membership and you can upgrade at any future date.

Allow plenty of time for shopping and checking out as I'm guessing the warehouses will be mobbed. Locations are in Bloomington, St. Louis Park, Eagan, White Bear Lake, Fridley, Apple Valley, Shakopee, Woodbury and Maple Grove.