It will depend on whether the item has tracking that can be followed or not, but in general the delivery date can not be guaranteed unless a specific service is paid for (for example, if sent with Australia Post, specifying a certain delivery date costs extra, otherwise the tracking will only show the date of delivery on the day it's going to be delivered).
Some courier services will show the scheduled delivery date on the tracking website.
On the listing page, there will be an estimated delivery date range which is based on the seller's handling time and average (or optimum) delivery time frames of the service selected, but it's important to note that these are just estimates eBay put there to give a general idea of when to expect arrival.
