Your question is to vague. Are you talking about straight glass, IR, IF, laser, combinations, picture talking ability, commercial, military, current, obsoete, etc..
The Burris Eliminator Laser Scope is the most expensive laser rifle scope in production. It costs about 950 to 1,000 dollars.
Carl Zeiss Hensoldt makes a scope that costs over $12000--which is way more than the rifle it's bolted to.
Possibly the BarrettBORS with Leupold Mark4 4.5-14x50mm - 66000-7WSPrice: $2,769.00
You will have to specify if you mean current maker, past maker, one with history (i.e. scope used on rifle to assasinate a prominent figure, etc..)
The BSA Sweet 17 rifle scope is an affordable scope that's designed for beginning rifle users. Average prices on the scope range from $50.00 to $100.00 in most cases.
If you mean the most expensive rifle that was available in 1902, it would likely be a high grade custom rifle from a firm such as Holland & Holland of England.
depends on the rifle and the scope. Most scopes will use 1 inch rings for that type rifle.
Swarovski rifle scopes are quite popular in the United States and frequently have updated models for consumer use. The most recently released scope to the market was the Z6(i) in 2013.
In excess of 8K
A used scope is worth, at most, about 30-50 percent of what a new replacement would cost.
Generally, a telescopic one. Like a scope on a Sniper rifle
the most popular .22 long rifle today is the ruger 10/22