It is likely that you will take the new items with you and so it wont be a wasted spend and could end up selling your home if it helps to make the room appeal to buyers. If you dont take them with you and the buyers like the space, you could offer to sell them - this is particularly handy for first-time buyers.
Consider a designer pack-and-go dining table. Plywood is lightweight and durable, and a plywood table can be flat-packed and assembled as needed at home. Your dining table then can be packed up and moved as necessary. Plus it works well in a home with modern Nordic or contemporary Asian style.
If you fall in love with a metal or marble table, don’t be discouraged from buying it, but do think about how you might safely transport it. As suggested above, choose a small, round marble table, or go for a wooden table with detachable legs.
For buyers on the move, choose a table that is easily transportable. For those who don’t stay put, a heavy table may prove to be an annoyance, weighing you down each time you move.