Either a typo or you splurged for the ten person van, haha. 1200 for a normal car.  I take Orange all the time to Pattaya and back.  When I first started using them I'd say maybe 1 trip in 10 was substandard in some way.  Now I haven't had a bad trip for a long time.  Once they sent a subaru that looked like it was ready for street racing.  The sport suspension made it one of my most uncomfortable rides ever.  I told Orange that they cannot do that to me again and maybe that message has got through because I've been upgraded for free twice now.  

I can also vouch for them. Been using Nam's taxi quite a few time, always on time and smooth sailing to/from Pattaya and lower suk/airport.

Just had confirmation back from Nam's, bargain, especially compared to the now even higher AOT prices: The price is 1200 bath all tolls included with sedan L. Driver will waiting for you at Meeting point near the Exit 3 (level 2) Please look for her with your name on a card. We will get back to you on the day evening with name of your driver and her picture.   

Thanks @jaredblanc, I'll see how I get on with Nam's but they will be my next port of call. A safe and comfortable drive is a much higher priority having experienced wild driving on Thai highways.

Waiting to hear back from them @Unavowed, the rate is v reasonable on the website. I'll report how I get on if I book with them.