Hello, 

According to previous year's record, you must score above 480 neet score in order to procure seat in government colleges .If your marks are alive 500, then your chance to land up in government college will increase. Browse the link given below to check the college you can get on the basis of your marks-

http://www.medicine.careers360.com/articles/neet-cutoff-maharashtra/amp
This is just a prediction based on previous year records. The result may vary this year. 

Hope this helps, 

Regards!