I've located one of these special run Glock G19s that I have an interest in. Its NIB at a retail store for $600+. This is a Gen 4, so that aspect makes it a little questionable. The intriguing features are the 'Dark Earth' frame color and the fact a limited number were produced. I've read that Dark Earth is the current military spec color for combat gear. This might be a Glock with long-term collector value. Shouldn't these Glocks appreciate over time just as the ODs have? Do these special run pistols receive extra attention at Glock during the manufacturing process (tighter QC)?