STEPS to reserve an item:
Go to the listing page
Select 'Ask the seller a question'
From the drop down list, select 'Request to reserve this item'
The seller will get back to you shortly and reserve the item
Important to note
The seller will then accept your hold request and the listing will be unavailable to purchase. This is unavailable for everyone on the platform, including yourself. Let them know when you are ready to check it out and they will un-reserve it for you.