Hi Christina,
In order to place a fair value, we would need much closer and clearer photos of the sides, the top, the grip straps front and back, as well as all markings. That being said, 1937 S/42 Lugers are relatively common with an estimated production of 126,000. Over all condition can vary the value by hundreds of dollars.
The letter "suffix" under the serial number on the front of the frame (below the barrel) would also have some bearing on value.
Here is a link to an on-line dealer's site. Keep in mind that their prices reflect a premium and are slightly higher than most by 20-25%. The holster, if in good condition, will add $200-$300 to the value, possibly more as it looks to be in excellent condition. The two matching magazines, with the tool will bump the price considerably also.
The 1937 in the link below is in average condition at 80%.
http://www.simpsonltd.com/product_in...61b94136c5216d
One more point. Lugers are also considered investments by many. The prices will rise and fall with the economy.
You state that it is in "storage" for 6 months. Is it in a public storage unit? If so, and it is in the holster? It could be damaged by moisture (rust) over the Winter reducing the value by half or even more. It should be stored out of the holster, wiped down with a light coat of oil and stored in a warm dry place, including the magazines and tool.
Ron