How can i get money out of my car which has failed it's smog test twice and cant be fixed (needs new engine)..

the government subsidized repair station says car needs new engine...but it actually runs with lots of exhaust and noise...cant be fixed to p smog test without new engine...would like to sell but dont know how or if anyone would buy a car in this condition...should i just sell for parts?...or try to sell car as is....need as much money as i can get out of car....soon...it is a Hyundai Accent Silver 1998 4 Door..everything else in good working order...please help with answer to my problem...thanks