Well, that was about if not the cheapest one out there, or was when I was looking around, after all it's only a pellet rifle.
I've not seen any add on night vision to existing scopes, the best you might do is a mini red flashlight attached under the barrel or a red spot over the scope, there are several choices in that area.
Here is a nice one:
Optronics Tracer Max Varmint Rifle Mounted Light Kit GL-200
As for Day/Night scopes, this baby is cool!
D-830 2.5-10x56 Generation 3 Advanced Day/Night System
But it will set you back a bunch, but will only focus down to 15 meters.
Almost all of my rat shooting is under 10 meters, and being cheap, I just use regular red floodlights in a stake mounted socket and plug them in with an extension cord.
Since rats don't see red light well, it works great.
George