What is the collective noun for vendor?

There isn't a single, widely accepted collective noun for vendors. However, here are a few options depending on the context:

General:

* A group of vendors

* A market of vendors

* A collection of vendors

More specific:

* A bazaar of vendors (for a marketplace)

* A posse of vendors (for a group of street vendors)

* A consortium of vendors (for a formal group of vendors working together)

Ultimately, the best collective noun will depend on the specific context and the desired tone.