I have been a customer for many many years. I only buy one or two items at a time now instead of 20+ twice a month. There are no longer any deals on ebay and they have set prices on the good stuff which is equivalent to buying them directly from the manufacturer.
Their BHFO site prices chop and change almost weekly. If they have a sale you will see the same item inflated by 30% when they have a %30 sale for example.
Their selling model sucks now, they used to be a great ebay store once upon a time...not so much now. I only buy when I am after an item and if I beleive the price is right, I will pounce on it because it could be 30% more the following week.