HBC is usually more expensive for the same parts that can be purchased elsewhere. Example: BB valve covers are way over priced when compared to the exact same ones sold by Crane Corvettes (both eBay pricing). Do your shopping.
Unless they (HBC or anyone else for that matter) have a truly one of a kind, hard to impossible to find part that you must have, keep looking.
Also, do not believe an item sold for XYZ usage is actually correct. Many times it isn't. As other have said here, post the URL for review.