Someone called telling me i can get wayyy more for my sled through their company.?

ok i have my sled up on KIJIJI for sale. some lady called saying that i can get double for it. literally. if i go through them. the way they make their money is that ppl who cant get finacing through any other way come to these ppl for it, so they dont care if the sleds 8 grand, that only means another 20 bucks a month to them over a long period of time. so idk? should i do it they want a 200 dollar profile thing first. sounds kinda scamish, but at the same time belivable. it makes sence. theres ppl out there who want things but cant get the finacing or can afford it, what do you do?? go to these ppl who aprove everyone and finace over many yrs so they dont care about the price.