Rules and What to Do:

1. Go to the Create Page on Roblox with your Account

https://www.roblox.com/develop

2. Select My Game

My Creation → Experiences, choose 1 game to add a gamepass

Click the gear icon (⋮) → Create Pass.

3. Upload Gamepass details

Upload an image and set names

Click Preview → Verify Upload.

4. Set the price (Robux tax covered)

In this case, set 2858

Go back to Create → Passes.

Find the Gamepass → click gear icon → Configure.

On the left menu, select Sales.

Turn on Item for Sale, then set the price in Robux.
DO NOT TURN ON REGIONAL PRICING !!!

Click Save 

5. Send the link after you buy

Copy the URL link (you can access it by going to ur profile > creations > click your game > choose store > choose the gamepass that you made)

You wil get roblux after 120h / 5 days.

Thank you