> For the complete documentation index, see [llms.txt](https://gum-ball.gitbook.io/gumball-protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gum-ball.gitbook.io/gumball-protocol/how-to/exchange/buy-gbt.md).

# Buy & Sell Collection Tokens

Users may buy and sell collection tokens of a gNFT directly rather than trading the gNFT itself. These are fungible ERC20 tokens that always allow a user to mint 1 gNFT from that specific collection.

## Requirements

* [x] ETH balance > current gas fees
* [x] WETH balance > current collection token market price 

## Steps

### 1. Select the 'Exchange' tab on the toolbar

<figure><img src="https://1778358387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwqs3mgbgfeItR3QWNNJA%2Fuploads%2Ft6oUXG6soQZebBkFmr8U%2Fv2%20screenshots3.png?alt=media&amp;token=6037c6dd-b2e9-4f13-82ff-dd7303c888ff" alt=""><figcaption></figcaption></figure>

### 2. Select the collection tokens you would like to trade

<figure><img src="https://1778358387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwqs3mgbgfeItR3QWNNJA%2Fuploads%2FZjdHtGXgwHoTJdUdQwIY%2Fv2%20screenshots4.png?alt=media&amp;token=aae8ac54-a86b-4d30-87dd-fd6901e30c5d" alt=""><figcaption></figcaption></figure>

### 3. Input the number of desired tokens and hit the "swap" button

![](https://1778358387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwqs3mgbgfeItR3QWNNJA%2Fuploads%2FvWuRGvvXekhsINHavkJg%2Fv2%20screenshots7.png?alt=media\&token=68d5ebc8-21cd-409d-b434-88f6dfec2cc4)

### 4. Click 'Confirm' on the Metamask pop-up to approve access

<div align="center"><img src="https://1778358387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwqs3mgbgfeItR3QWNNJA%2Fuploads%2FfgknzIKOvI0hA79KAzNm%2Fmetamask%20approve.png?alt=media&amp;token=43c493ca-b82f-44c3-b031-5c8caa3b4193" alt=""></div>

### 7. Click 'Confirm' on the next Metamask pop-up to initiate buy

![](https://1778358387-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwqs3mgbgfeItR3QWNNJA%2Fuploads%2F2eW4irAQfePWe5syPwET%2Fmetamask%20confirm.png?alt=media\&token=8ed36025-6122-4c9a-91c9-8ba8dea36eae)