Got mine from EBay seller color-fashion6 for $50. My unit has the RF shielding and the built-in battery. Came in a nice plastic storage case along with calibration loads and cables.Works exactly as advertised. Demand must be increasing because price is now up to $58 just 3 weeks after I purchased.
I'm really impressed what this little gem can do! It pretty much blows every other antenna analyzer and portable VNA out of the water, especially at the price point. My only complaint/suggestion is that it would be easier to use if it were about twice the size with a corresponding larger display. However, once you hook it to a computer it looks and works like a 'big box' unit costing at least 50x more.
Definitely worth the money. Every shack/bench should have one. I rate it .
Joe
W3JDR