Pretty good. Obviously not as good say a vet bring back K98. Expect electro-pencil forced matching by the russians and shellaced stocks. There may also be various capture markings on the reciever and some proof marks may be marked out. Functionally they are great!
Also, even though they are not the Crème de la crème they still are worth over 400 USD. Drill/Tapping the receiver or hacking the stock will result in significant decrease in value.