Yeah, Mariners do that then settle at the deadline typically. not a horrible approach. Hope some teams overpays and then settle down, rarely hurts especially with a reliever since they have minimal value.
What's dumb is that the Mets and Twins won't consider trading Parnell or Perkins. Bad teams shouldn't hold onto top relievers. If the Braves start stinking we better ship Kimbrel off to the highest bidder.