I did put new shockers on once when the car had a hard to find clunk in the suspension but TBH I now think it did not need them. They were not very expensive and easy to fit and do not involve removing the springs. You can get an idea if the shocks are good by trying to bounce that corner of the car and seeing how quickly it damps down, but the real test is to undo one end of the shock and excercise it through its travel, it should be smooth and very hard to push over its whole stroke. It will be harder to compress than expand, rebound damping is usually lower.