This is quite interesting as I own a 2006 left hand drive 130hp manual imported through Deepcar as well. I'm the 2nd owner and it has done 130k miles. All original and in great condition but not mint.
I suspected it was worth around £21k (perhaps a little more) which is as cheap as Cali's come.
I saw the advert and lusted after the low miles and likely mint condition. But, the pre 2006 engines can develop some serious camshaft and exhaust manifold problems, and the autobox doesn't have the greatest reputation for reliability and is expensive to fix. So I'm not sure 174hp and auto adds value at this age, to people who are obviously working on a lower budget (fuel and maintenance).
If it is as good as it sounds, then it needs to find a vw enthusiast who will cherish it and take it to shows, like the guys with the T25 and T4 Westfalias do.
It is difficult to price. The text and unusual photos didn't put me off, except the one showing off your fleet. (I was looking at the van not the bare bum). I suspect any buyer for your particular van will already know about what's inside.
Any buyer would certainly want confirmation of the 'mint' condition before setting off for anything other than a local viewing.
I wonder if mine will eventually get bought by someone from the continent, where prices are higher.
My guess is your asking price needs to start with a 2, even if its 29995.