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Good Advice !

For those who don't know the link provided by @mysearchisover is a link to a site that tracks bid bots. The site shows a rough value on the return you will get on your bid at the moment of purchase. Your bids value will decrease as more Steemians send in bids. It's best to bid minutes before a bot sends out bids as it gives you the most chance of seeing if its worth using the bot. You don't want to be paying $2 for $1 vote.

And without @dustsweeper my upvote on your reply would have been a waste of an upvote.