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.
$175 to $800 depending on condition and matching parts.
It depends what model and if it is in goood shape or not
value depends on overall condition. your mauser COULD be worth $900-$1200
$300.00-500.00 usd
Yes, it lowers the value. The numbers will no longer match. Keeping the original engine is the ideal situation which will make the car worth more.
There is no way you can call it 100% original if it is re-chambered.
Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Recommend taking it to a gun shop for appraisal.
50-1000 USD depending on specifics
It depends on condition and rarity. There are several variations of the 1st and second models. The current, 2012 value for a model 1 ranges from $350 - 1000+ and for model 2 the range is $400 - 2000+. These values are for examples in good or better condition with all matching serial numbers and no missing or damaged parts. The + on the high end would be for excellent condition, rare variation with a special factory original feature(s).
50-500 USD
rsi would say the value of the spanish mauser and bayonet value at 695.99 dollars