I recently purchaced NX100 Polaris (I think its Basic ver.) from local vendor for 18000/- (after seeing all this online websites that sell same for almost half price i feel so dumb of me

But, because of trust issue im unable decide to buy accessories & pellets from these sites (offline vendor sold me precihole round head pellet for 800/-)
Can you guys kindly share those sites to me, i'm thinking of buying aperture site front site adapter & some pellets and grease. (for info: Precihole official site dont deliver product to my postal code)
Also, there is some oil in the side where 11mm rail is, is it normal its only some days old.
and is it safe to apply vinyl (I already did that

and im thinking about applying some black mate spray in brown stock... is it okay to do that?
also saw some topics about nx100 scorpious (is it different than what i own, if yes how?)
and also pls, share how you maintain air rifle, i'm totally noob at it, just know basic handling (Source: i'm pc gamer

My apologies for the lots of different question in single topic, dont want to create multiplen redundant topics.
Finally some pics of my new overpaid nx100.