You mean "What is the best air rifle on the market. This is all a matter of your personal opinion. It all depends on the intended use.
As an example if you want hunting power, then I suggest purchasing a "Sam Yang .50 caliber dragon claw" It will cost you around $600. If you want accuracy, then select the Olympic air rifle "Feinwerkbau." It will only set you back $3750. If you want versatility them I suggest an "Airforce Condor" the average cost is around $1000.
All of these air rifle require a support system that usually runs around an additional $350.
The selection is yours. These are considered amoung the best in air rifles.
There is NO Best and inexpensive air rifle. A good quality air rifle is going to cost you money. A cheap air rifle will reflect it quality by how poorly it performs.
You will need to define "best".
One of the best is a Feinwerkbau Westinger & Altenburger. Biathlon Air Rifle Model P700 Aluminum. Average cost $2,480. It's an Olympic Match Rifle.
The "Best" is really up to the user. What is best for me, may not be to your liking. I suggest you read reviews by owners and make a selection that way. See the link below, it not only provides choices but owner reviews on each rifle / pistol. Just open the link and then open each rifle you like and read (at the bottom) the Owners reviews. The web link has almost ever air rifle available on the market today.
At the very best this rifle is worth around $27 in today's market. So it is not worth repairing. But if you really want to spend the money try searching "Air gun repair" on the web and locate someone who will repair it for you.
One of the best is a Feinwerkbau Westinger & Altenburger. Biathlon Air Rifle Model P700 Aluminum. Average cost $2,480. It's an Olympic Match Rifle. The best air rifles for target shooting are Olympic Biathlon match rifles.
You will need to specify the use.
I always seem to buy the worst air conditioner on the market. Where can I find reviews on the best air conditioner to buy?
I suggest you look at the link below. Pyramyd Air is the largest dealer that I know of in the air gun market.
One that was designed for air rifles. Best will be determined by your intended use and how much you spend.
The best electronic air filter on the market is Lifetime electrostatic furnace filter. You can read review at www.consumersearch.com/air-purifiers and www.lifetimeelectrostaticfilter.com
Best left to a trained professional.