Advice on buying imported air rifle

[naga_sniper]

Hi everyone, New member here.
Excited to go on this venture, share and learn about air rifle.
I've had several Indian made rifles in the past. Am now looking to buy imported .177 cal air rifle. I was looking up this website I offer.com and one seller offered that custom clearance will be cleared with the amount that we aggred.
I have doubts that custom will cease my item and pay extra fees for release. Will cost me a lot just to go to and fro if its held up as I live in northeast India. And I'm on a tight budget which is why relishsports and airgunindia will be my last option.
Benjamin trial NP XL is my choice for pest control.
Kindly help..