When it comes to specific electronic components, yes they tend to be overpriced, but by the time you pay postage and/or shipping it more than evens out. In my (limited) experience of the stores, the main problem is that the staff don't really know a great deal about the electronic components they have hidden away in a tray somewhere near the back so you may need to go in armed with information and a specific shopping list. There are exceptions to the rule of course, you may find a store with a real electronics geek who just happens to work there, but prepare to be faced by a young kid, fresh out of school, who thinks he knows a bit about televisions and remote controlled toys.....