Hey! As it's already been said a few times, it greatly depends on your material source. If you buy local, it may be much more expensive than ebay/aliexpress. Also if u live in US, metric profiles are usually more expensive than imperial ones, so some of the guys went with 1" version instead of 30mm extrusions (to buy local - cheap). So I've personally spent around 200-250eur for everything, RPI for octoprint and Logitech IP camera included, along with everything else. But I've shopped things locally. Basic electronics is around 30-70e, depends on how "fancy" you want to get.