Dosen't seem to be anything wrong with the components of the rifle. Just hope that whoever chambered the barrel knew what they were doing. Douglas makes good barrels, but not the best barrels.
Free FN Mauser 98 action in 7mm08
$500.00 McMillan Blue/White marble fiberglass stock, heavy benchrest style
$285.00 24'' douglas ss bull barrel
$ 65.00 leupold base and rings
$175.00 chambering and misc. labor
$1025.00 Total estimated cost
While the Mauser action is good and strong, I'm not convinced that it's the best platform for a custom rifle. Particularlly the Military actions, in order for them to work under battle conditions the bolts are 'loose' in the action. A quality benchrest action and bolt are fitted with minimum slop. In other words, the military bolt has considerable movement up, down and left right. The benchrest action and bolt fit very tight with little movement. Excluding custom actions, Remington or Savage are probably the better choice because of after market parts. The military bolt like a Remington or Savage bolt should be sleaved to minimize unwanted slop at additional cost.
Regarding the DST. Why? Consider that you will most likely need to either modify the guard or replace it to accomodate the extra trigger. A DST will require the services of a
real gunsmith and that will add to your cost. Instead, why not go to a single set trigger (SST)? Either can be purchased from Midway.
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=716334Good deal? Based on costs to replicate?
I think you got a terrific bargain! 
Hope the gun shoots well for you.
Regards