A lot of users here will have used SteamTrades.
Here's a quick and easy (low effort) trick to make your trade post easier to read, and add more info.

You could add a link to the game on steam, add a source, etc.

https://i.imgur.com/eOHmpdU.png

Simply:

• Add a row under the header name and add a - dash - in each column.
• Next, add a column between each column, and fill it with the pipe character |
• Simply copy the columns you want to make into a table, and paste it into SteamTrades.

Result:

• https://i.imgur.com/TIBmLGN.png