TPS SUZUKI MARUTI 2 PART

Hello again.
About two months ago, I saw a website selling TPS sensors for a very good price, $50,000. The seller said it was for several vehicles (Suzuki, Maruti, Chevrolet, etc., even motorcycles). I never heard from that website again. My question is,
does anyone know where I can find one for my Maruti at that price? Because in stores, they're very expensive, between $130,000 and $160,000,
almost triple
the price. My other question is, why does the price vary from one vehicle to another
? The one for a Nissan Terrano costs 70,000 and the one for my Maruti costs 130,000. Why the difference if my car is worth less?
My car's was stolen and I've been driving without it for over a year. Even so, it still runs. The problem is at idle; sometimes it revs up, other times it feels like it's going to fall apart from the shaking.
I await your response. Thank you,
Victor, a Chilean at heart.

Here in Chile they hang from the brands to define the value of the spare parts, usually always a vahiculo that has the same components at a lower price this happens a lot between Mitsubishi and Hyunday.