Step 1: VOTE!
There is a survey on which you can vote for your favorite items that you want to go limited/go on sale/come out/etc... You can find the link to this survey in your "Notifacations" tab on your ROBLOX homepage, It will not ask you for your ROBLOX username or password, if it does, it is fake!
Step 2: Vote here!
By looking over to your right side of the screen, you will see a survey entitled "What will go limited", after voting for real, post what you chose! I'd like to see what you all are voting for!
Step 3: WAIT!
Now just wait, The team here will periodically advertise to vote for a certain item to go limited if we think it's a good item, rare, and old. If you vote, then you have more of a chance of getting your way!
Step 4: Repeat
You're allowed another vote on an alternate account, so why not!