I have nearly bought one many times as it is not locked to an individual vehicle although you have to specify the model. (L322 / Sport / Disco etc)

I have emailed these guys a few times and seemed very helpful, and the seller you have linked looks ok.
https://www.ebay.co.uk/usr/alphauk7?ul_noapp=true

i have not heard any bad reports about them, i don't think they are as user friendly as something like the Gap IID but probably a third of the price.
i think if you bought it and was unhappy you could send it back.
I would buy one but i have no idea how it works with the sport although it says it is compatible and I would have thought the systems are similar throughout the landrover range.
 
I have the baby version i930, and I think it would be worth paying the extra in your case to get oil reset and electric park brake if you intend to do some of your own servicing.
 

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