In the broadest category on the site there is no single answer, but there is one habit that covers most of it.
Measure what actually ships
Not the piece — the packed outer box, with filling and, where the packaging is part of the value, a carton around the carton. Most couriers price on size as well as weight, and a well-protected collectible is a much bigger parcel than the thing inside it.
An underquoted parcel comes off your own balance rather than the buyer's. How delivery is charged.
Then ask how it fails
Fragile and light → double-box, courier. Heavy and robust → weight rule, courier. Large and awkward → collection or your own delivery. Irreplaceable → collection, every time.
Packing collectibles has the method.
The four options
Courier, your own delivery, pickup, and buyer arranges — and the five delivery options on your store bundle them: across India, local only, pickup only, local plus pickup, or one you build yourself. Pick per item rather than once for everything; each listing chooses its own. Setting up delivery.
When collection is the honest answer
For anything large, anything irreplaceable, and anything where a sensible box would cost more than the piece. Agreed before bidding, with a collect-by window. How pickup works.
Combining wins
On by default, with what each later win adds set by you. For a mixed category, think about the largest thing likely to be won rather than the smallest.
Questions people ask
Can different items use different options?
Yes. Each listing picks one, which is the point of having five.
Should I ever decline to post something?
Yes, in writing, with collection offered instead.
What dispatch window?
One you can keep in a busy week.