Good and cheap don't go together with most anything. Air rifle cost anywhere between $60 and $3000. But you get what you pay for. Really good air rifles start around $200. An Olympic class air rifle...
a good air rifle is one that you can afford. I suggest you read the reviews of other owners who own them. I suggest the link that is posted below to find an assortment of air guns and rifles and read...
Gamo makes a dozen different rifles and pistol's. I find then to be of Very Good quality. I personally prefer the Nitro piston models over Spring. The new Dynamax (PCP) looks promising but expensive.
For years Beeman was considered to be an excellent brand of air rifles. But due to economics their quality has fallen off. You will find more plastic creeping into the assembly, like triggers and...