There are a number of unscrupulous ebay sellers who have written misleading listings that are either trying to suggest that the $75 Deluxe Edition (still available at ghosts.nin.com and Artists in Residence) is also sold out or imply that the $75 edition they are selling is actually the $300. (I saw one asking for a $150 "Buy It Now" price.)
At the time I'm writing this there is no indication that any of the other editions will be limited. This includes the CD and 130 gram vinyl releases headed for retail April 8th.