Was both items from the same supplier?
or a different one? Who was it?
I understand the way your feeling about dropshippers and out of stock items.Its happended to me several times.
What I,ve started doing with some of the dropshipper that have run out of stock on a product that Ihave aready sold, is to just buy what I list and send it to myself, that way I know that I can fullfill my listings.
Of course make sure you do your market research first to make sure do don't get stuck with the item or take a lose just to move it.
I also try to keep my listing fairly short so to help ensure that I can still aquire the item I want, from my more reliable suppliers.
I have also started buying product 'lots' from liquidation suppliers. Most have auctions on 'new' items at much better prices than most dropshippers.