The best you can afford from any reputable maker.
I BUY AND SELL THESE ,ABOUT $100 IF IN REAL GOOD CONDITION
The best one you can afford that was designed for 22LR rifles.
you will have to have a gunsmith check it to be sure.
175 USD
175 USD
eBay would be a good place to start
22LR
There are no "good" scopes for that price. If you haven't the money to buy a decent scope, odds are you don't need one.
Gun shop, gun show
Yes it is.
for how much
"Best" depends on what you want to use it for. Hunting squirrels you will need a different scope than you would use for 100 meter benchrest shooting. Like most things, you will get what you pay for. The higher dollar scope is likely to be brighter, not fog up, hold a zero, and be more durable.