I have been purchasing from "Ebay" since last year and I am not an expert yet but little by little I have learned that when you decide to buy an item from Ebay, you need to do your homework or leg work 1st and you will find out that Ebay is the best way to purchase your product.
You need to find out: who,what,where and when. "Who," would take you to buy the product or "What" is the driving distance or the miles round trip to go purchase the product & what is the cost or price? "Where" or the location of the store they sell the product you are looking for? "When," would you be able to purchase the product?
When you add those things up... 9 out of 10 times, it is best to get it from Ebay!