Go on line and start shopping around. About 8 months ago I was looking and the cheapest night vision scope I found was around $700 (used). The prices may have come down some but there’s lots you need to learn about these scopes. The cheaper ones are what they call Gen 1. Gen 2 and Gen 3 are much better scopes but can get up over $5,000. Study the subject well before you buy or you could wind up spending $500-$1,000 and not be happy with your purchase.