Anyone know how much a nickel plated, entree table with marble top? $?

I have inherited a entree way table, or maybe you could call it a sideboard?? Not sure. It is very eligant. It is about 40" H X 36"W X about a foot deep. It is just a four legged frame made of (I suppose steel or iron), but is beautifully plated completely with nickel. (It shines like polished chrome)...all the legs have ornate, decorative designs, (which lead into the "knee" of the legs), which then shape themselves into some kind of "tribal warrior head" or as I call them, "little tiki dudes"!! Then there is a beautiful carved piece of marble slab that is curved from both sides to meet in the middle at the largest arc. It is made to rest against the wall, (as it has no finish to back). I have had many people comment on how unique and elaborate this piece is. Now if only I had some idea of where its origin is from or how much value it may have? I received it from my Grandmother, whom is now deceased. I would just like to gain some knowledge of the piece. ???Answers?