That's Ebay pricing, pre-release by retailers, I wouldn't pay any attention to that.
Years ago, PS3 was going for $1,000+ when they first came out and nobody had them in stock.
I had a chat with someone on the DJI website this morning. See below. I'm not sure how much I should trust what was said, but this person said that the pricing should be released pretty shortly. She also explained that the TB48 will have an official flight time of 22 minutes compared to the 18 minutes for the TB47.
(05:28:18)*** Visitor 92800032 joined the chat ***
(05:28:19) Visitor 92800032: Inspire One
(05:28:31) Bob E.: Have a question
(05:29:00)*** Cherry joined the chat ***
(05:29:08) Cherry: Hi welcome to DJI
(05:29:19) Bob E.: Have a question
(05:29:35) Bob E.: About the Inspire One
(05:29:52) Bob E.: Are you familiar with the product?
(05:30:26) Cherry: yes, you can buy from us
(05:30:42) Bob E.: I have a question first before I buy it.
(05:31:16) Bob E.: Is Lightbridge GROUND STATION built into the RC?
(05:31:59) Cherry: no
(05:32:08) Bob E.: Are you absolutely sure?
(05:32:55) Bob E.: Also, How much is the TB48 and TB47 battery and what are the differences?
(05:33:46) Cherry: yes ground station of Inspire I still under process
(05:34:02) Cherry: the price for the battery will release by next week
(05:34:15) Cherry: flying time for TB48 22mins
(05:34:27) Cherry: TB47 18mins
(05:35:12) Bob E.: What do you mean "is still under process?" for Lightbridge?
(05:36:02) Cherry: lightbridge just for FPV
(05:36:11) Cherry: not ground station
(05:37:39) Bob E.: So the lightbridge built into the Inspire One provides FPV to the C1 Remote Controller but cannot provide Ground Station capability at this time?
(05:39:09) Cherry: yes
(05:39:35) Cherry: another new lightbridge ,
(05:41:06) Bob E.: Another lightbridge what?
(05:42:37) Cherry: because we use the update lightbridge ,
(05:42:53) Cherry: better then the old one
(05:43:52) Bob E.: So will the Inspire 1 work with old lightbridge or only with new one?
(05:44:49) Cherry: only with new
(05:45:01) Cherry: already built indise
(05:45:05) Cherry: inside
(05:45:47) Bob E.: Will old GroundStation work with new one built inside Inspire 1?
(05:46:17) Cherry: sorry do not get the official news about it
(05:47:48) Bob E.: Will TB48 battery be available on Dec 1st?
(05:48:26) Bob E.: Will chargers for Phantom 2 batteries work for TB47 and TB48?
(05:49:04) Cherry: I think so , kindly wait for few days
(05:49:50) Bob E.: Wait for a few days until what?
(05:52:23) Cherry: next week
(05:53:02) Bob E.: Are you saying more information will be available next week?
(05:53:10) Cherry: yes
(05:53:20) Bob E.: Ok. Thank you.
(05:53:36) Cherry: you are welcome , thank you for your patience
(05:54:05)*** Bob E. left the chat ***