100-10000 usd
Depending on who did the conversion; 100-500 USD
This rifle (Mauser Model 2000) is worth $350 in excellent condition.
If the rifle is in good shape it is worth $450 to $500 You do not give enough info to price out the scope as there are many different Leupold models.
$450
100-1000 usd
How much does an 1899 German made Mauser 6.5x55mm worth? Or how much would one cost to buy??
Depends on whether this is a pistol or a rifle - Mauser designed and produced many guns. Also, what condition it's in.
Mauser Waffenfabrik never manufactured a .30-06 rifle. You MIGHT have an M1917 rifle, which can be worth over $1200 in good condition and all matching serial numbers.
No such thing. The Soviet Union never manufactured the Mauser.
100-1000 USD or more depending on specifics.
50-200 USD or so