I can't speak for the US, but in the UK and Europe their prices are very expensive. They are renowned for overcharging mercilessly across almost the entire range of products.
However, it's your lucky day, as the X-kit is in fact very good value.
Please be aware that as you upgrade, they will get you on the prices. They have attracted a lot of negative attention by making out some products are on 'sale' price when they are nothing of the sort.
Good luck.
