It looks like an IBM golfball console printer so has no compute power on its own. The are reasonably rare, but I wouldn't say valuable. Most folks don't have the space. It will be gummed up and need a service. If you have an APL golfball (it appears to have APL symbols stuck on the key fronts) it might be worth more. Some one was asking about on the green keys list .....
Looking for Analog Computers, Drum Plotters, and Graphics Terminals