what does mps mean on a sculpture collectable figure?

MPS typically stands for "Manufacturer's Production Sample." It refers to a sample of a collectible figure that the manufacturer produces before mass production. It's used to check the quality, colors, and other details of the figure before making a larger batch for sale.

Is it more rare ?

Yes, MPS (Manufacturer's Production Sample) collectible figures are generally considered to be more rare than the regular production figures. Since they are created before mass production and are used for quality control purposes, there are fewer of them available in the market. This rarity can make them more appealing to collectors and potentially increase their value.