just my opinion, but it seems to me that you dont need to rush this purchase as you already have a few cars so it isnt imperative you buy this actual car. I would consider trying to hold off a day or so, a) you have shown plenty of interest and are clearly not a time waster b) who knows what will come up in the next few days? c) hunting and viewing potential purchases is half the fun, its not like this car is unique and d) prices are going one way for this type of car.
Get your poker head on!