They are fun. You can, if you pay attention and are careful, get all sorts of things for very little cost.
Also as you are having fun you are getting much needed VersaPoints. One for each and every bid.
Just start out slow with one of the 1st timer auctions. Find something you really want and start bidding. I like auctions with no auto-bidder. It means people are paying attention and taking personal care for each and every bid.