Two questions decide a comic's price and the first one is binary.
Which printing
A first printing and a later printing of the same issue are different items, frequently by a multiple. Establish it from the indicia before you price anything.
If you cannot establish it, say so and price as uncertain. The room will often tell you.
Then condition
Steeply, and not linearly. The difference between a clean copy and a creased one is larger than new sellers expect, and page colour and spine condition both move it.
What to auction and what to lot
Auction individually: keys, first appearances, anything where the printing or condition is worth a conversation.
Lot: runs, commons, reading copies. A run sells better as a run, and auctioning forty issues one at a time empties a room. Describe a lot by issue numbers, completeness, and condition range.
Starting prices
Low, with a reserve on anything with a real floor. Why low starts end higher.
Indian comics
A narrower audience, and a knowledgeable one. Being specific about publisher, language and print run matters more here than starting price does — the people who want it know what it is, and the people who do not will not bid whatever you start at.
Questions people ask
Should I grade before selling?
For a genuine key in good condition, often worth it. For everything else the fee and the wait exceed the gain.
How do I price a run?
Below the sum of the issues. Convenience is the discount.
What if I do not know if it is a first printing?
Say so, show the indicia, and let the room decide.
More: selling comics.