What you will find is that most RTT are built by the same manufacture. If the price is right I would go for it, you really cannot go wrong here with most of the commen ones. But i would verify the model as well and see or compare if this is a recent model or a 10 year old model. (I thing most ARB tents are more recent though)
That is how I got mine. The price was killer. I looked at the ARB tent and I think it looks great.
2005 LR3 with a ton of options like the rear locker, heated windscreen, and a electric cooler for drinks! But no butler. <-- being built for light expedition duty
1962 M416 Trailer being rebuilt for Expedition duty