Well, shipping is hardly ever "free" on something that weighs so much. It is just factored into the price.
Finding a local shop with the tools and time to create such things are what most folk have an issue with. If you have such a place local, most times a small table like OP wants can be made from scraps of other jobs. An hour on laser to cut the parts and an hour in the weld shop for assembly would be cheaper than the tables listed. Since he plans on assembling the shipped unit, he could even save some by doing his own welding.