Hello,
At a neet score of 439 you have less chances for medical seat in delhi for UR category as the cutoff is high around 550+
you can apply to get into any private medical college in india but however we recommend you to take admission in private medical colleges of karnataka or maharashtra as the fee is quite less there around 6-7 lakes per annum and also they provide with all the latest equipments and facilities required during mbbs course.
Also maharashtra and karnataka have maximum no. Of private colleges in the country so you have more and better options to chose from.
You can use careers360 college predictor to know the colleges you can get at your NEET score:- https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer
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