I searched my area for the g614's and could not find a dealer that was even close to 300. Wingfoot was the best at 350 (plus,plus) the GY company store was the worst at over 400. Most dealers were around 360. I payed 189 (plus, plus) for my Sailun.
The OP did just fine. The Sailun will give him good service if they are well maintained and not overloaded.