Hmmm... not really. I think the most economical time to buy is when you can afford a piece you desperately want. That's when you'll buy and KEEP the item. As opposed to buy then sell cheaply through any outlet at a loss.
All Tiffany pieces will experience price increases, so I'd aim for the ones that are the highest price you can afford, that increase in value the most.
All Tiffany pieces will experience price increases, so I'd aim for the ones that are the highest price you can afford, that increase in value the most.