I have many items where postage is double the item price. Unfortunately most times a sale will be only for one item but I have priced them so it would allow a buyer to purchase one each of a few items to make it worth my while for me to pack.

I am at the point unless I need the extra sales to keep my postage discount I feel I would be better of without that price point so have either increased the price and added a discount for those who purchase multiples to keep the price the same for them. I figure there are buyers who are happy to pay for convenience and will only buy what they need. 

One of these items had not sold for a few months then suddenly a buyer purchased all I had which was 20 plus lots. I thought to myself I would rather miss all the single purchases and just have the odd one every 6 months for a large quantity.