The Alexa body shape reminds me of the RED Camera body design. I could not find pricing on the website but I did some searches and found pricing to be between $50,000 to 70,000 depending on the mount and where you buy it.
Here are some of the specs I got from the ARRI website.
The ALEXA Mini LF uses the same sensor as the ALEXA LF. This is the ALEV 3 A2X sensor, which has the same photosite size and type as the Super 35 ARRI digital cameras. It has 4448 x 3096 photosites (yes, it is therefore a 4.5K sensor) and measures 36.70 x 25.54 mm.
The ALEXA Mini LF has the same dimensions and the same mounting points as the ALEXA Mini, except for the media bay on the camera left side. Current prototypes weigh in at 2.6 Kg/5.7 lbs for the camera body with LPL lens mount and 800 g/1.7 lbs for the MVF-2 viewfinder.
The ALEXA Mini LF supports the same recording formats as the ALEXA LF.
The ALEXA Mini LF uses the Codex Compact Drive 1 TB.
The Compact Drive has been specifically designed for the small form factor of the ALEXA Mini LF, using new flash technology in a miniaturized tough casing. The ALEXA LF Mini accepts Compact Drives directly, without the need for an adapter.
The Compact Drive 1 TB contains one industrial SSD and both ARRIRAW and Apple ProRes recording can utilize the drive’s full recording capacity of 960 GB. The drive will be formatted by the ALEXA Mini LF in the UDF format for ARRIRAW and ProRes. Therefore, both ARRIRAW and ProRes can be recorded onto the same media without reformatting or switching drives. The drive offers sustained write rates of up to 8 Gb/s.