If you are looking at this auction, you likely realize that Electrolytic capacitors have a finite life, most Consumer Grade electrolytics including modern units have engineered lives of 1000-5000 hours at which point they begin to fail, which includes changing values, increased electrical leakage, increased ESR or outright failure such as opening up or shorts, many times these failures are cummulative and result in the gradual loss of performance. This upgrade will improve the function and reliability of your equipment  andextend the usefull Life. Faulty capacitors are the cause of a significant amount of problems with electronic equipment and I have repaired hundreds of units in which the only fault was one or 2 defective Electrolytic capacitors. Replacing all out of spec capacitors is recommended and often restores the equipment to like new performance. Failure to replace them can result in failure/stress to other components such as transformers, transistors and diodes, many of which are hard to replace due to lack of suitable components. Recapping is a good investment and an immensely satisfying project.  Work slow, have fun and prepare to be impressed with your work.