Online, the best place to buy any type of footware, including the GSG9 boots, is from Zappos They will 110% match the price of any competitor, and usually offer free shipping. So, if you want the GSG9 boots, wait until they go on sale at Botach, then order them from Zappos at the Botach price!
Whatever you do, stay far, far away from Botach. They have horrendous customer service and unethical (borderline illegal) business practices. About a year ago, I ordered a pair of Royal Robbins 5.11 pants from Botach. According to Botach's online store (run through Yahoo), the pants were in stock and would be shipped out the next day. I emailed their customer service dept to get a UPS tracking number.
After emailing them 3 different times for a week and a half, I finally get a response that, "Sorry, the pants are out of stock, we don't know when we'll get more in." Meanwhile, Botach took the liberty of charging my credit card in full, knowing full well that the item was not in stock. I was not a happy camper. Luckily, I was able to cancel the order and get Botach to reverse the charges. I have personally talked/emailed with several other people who have had the same thing happen with Botach (items not in stock when they were told otherwise, credit cards charged for items not in stock, no response from customer service for weeks, etc.)
-David