You can purchase very cheap ($200-300) products on Amazon or at Harbor Freight that are marketed as fixture tables. For a hobbyist working on tiny, lightweight projects with no critical flatness requirements, they would work fine.
For a table with a demonstrably flat surface, fixture holes, and sturdy weight-bearing capacity, the price for a quality table is, very generally, around $1/sq inch of surface space. Premium tables made from thicker materials, fully machined, and with a surface treatment, may cost 2-3 times that.