I list a number of items together in my Etsy Shop each month (a batch) and notify of the time and date through Instagram. I am also very happy to notify via email (drop me a line with your email address if you would prefer this or hit the subscribe button at the bottom of the page) I also provide a preview of the items on my website (see batches for previous previews) The listings sell out in a matter of minutes so keen buyers need to be online at the time of upload. I am in Sydney, Australia so all times listed are AEST (be sure to check out what that equates to if you are not in Sydney... World Clock on your smart phone is very handy for this).
The batch sales are used for my more popular items so that everyone has an equal chance of snagging one. I vary the batch sale time each month as it is tricky to find a time that suits all countries.
Tips for successful purchasing
Sadly the Etsy shopping cart does not allow for items to be reserved for any length of time so checkout has to happen very quickly for a purchase to be successful. Items can jump out of the shopping cart if someone else completes payment on that item first. Set up Direct Checkout details in your Etsy profile prior to the sale (refer to the Etsy help page if you are not sure how to do this) to ensure you don't miss out as PayPal redirect takes too long. Best to checkout with each item separately and I will always combine shipping and refund the overage. Apologies for any unsuccessful attempts and disappointment. I am not trying to create a demand... I am just making as many pieces as I can and sharing them in the fairest way possible.
I'm sorry but I don't do custom orders.