There is no separate "lot" feature, and you do not need one. A lot is one listing whose item happens to be several objects, described that way.
So you create a normal listing, photograph the group, and say exactly what is in it.
When a lot makes sense
- Things worth more together — a set of six glasses, a complete run of comics, a pair of lamps.
- Things not worth listing alone. Forty buttons, a box of mixed thread, oddments from a clearance. Individually they are not worth the ten minutes each.
- Clearing the tail of a collection, where the good pieces have gone and the rest should go together.
When it does not
- When one item in it is clearly the valuable one. Buyers bid for that and the rest is friction. Sell it alone.
- When the contents vary in condition so much that you cannot describe them honestly in one description.
- When it is heavy. A lot of twenty things is a big box, and a courier bills the greater of weight and size. Why is a light thing costing so much to post?
How to describe one so nobody is surprised
The whole risk in a lot is the buyer expecting something you did not promise. So:
Say how many. "Twelve pieces" — and then photograph twelve, laid out, countable.
Say what the condition range is. "Eight in good condition, four with chips" is a far better listing than "mixed condition". A buyer can price the first; the second is a guess.
Name the worst item. If one piece is broken, say so. An undisclosed flaw in a lot is still a flaw not as described, and it comes back for 7 days whatever your returns policy says.
Say what is not included. No box, no papers, no spares — whatever a buyer might assume.
Use the photographs for counting. Everything that is included, laid out together, is the single most useful shot for a lot. How many photos should a listing have?
Bundle deals are a different thing
Worth separating, because the word collides. Bundle deals are a cart promotion, not a way to list a lot. Three shapes:
Any few for one price— a set number of items from your store for a fixed totalPercent off a few— a discount once a buyer has several in the cartFree delivery over an amount
Those reward a bigger cart across your listings. They do not combine items into one listing. How to run an offer
In a live show
Lots work well live, because you can hold the pile up and count it on camera. That is something a listing photograph cannot do, and it is why clearance lots often sell better in a show than at a fixed price.
More: I have twenty of the same thing, how to create a listing, how to write a condition description.