The Adventure which is in stock in Thailand, so delivery can be immediate is priced at 1,110,000 Baht. It is the R1200GSA MU, which has a number of accessories including the electronically adjustable suspension, ABS, tyre pressure sensors, full computer etc. The R1200GS MU which i bought is 998,000, same sort of accessories, but no engine guards. The price is a drive away price, Tax, 1st class insurance, Number plate, (About 4 weeks), 2 year warranty. Discounts are unlikely unless policy changes, with some manufacturers like Kawasaki, offering lower price models into the market place.
The GSA adventure is taller, fitted with pannier racking, but not the panniers and fitted with the engine guards. It has more offroad capability than the GS, but my view is that these bikes are to big heavy to do any real off road work, so as I spend over 90% of my time on surfaced roads, I decided the GS was a better option for me.
The R1200GS Mu and the R1200GSA MU are the only models I have seen in the showrooms here, The non MU models without ABS, ESA, spoke wheels, tyre pressure sensors and computer are about 50,000 Baht cheaper, may be available to special order.