Getting a free figure does effectively drop the price, but that also invalidates the "free"ness of it...!
herbhen - I can't find any discount codes (and there often aren't ones that work on pre-orders anyway), but if there are discounts when it's out... maybe. I worry that it may not make it to retail, though: some Collector's Sets are only produced in pre-order numbers.
As for the 'sake of $5', well... I wasn't clear! I would feel that $175 was overpriced, but more of a justifiable number mostly for psychological reasons. I might feel that $50 for the base isn't unreasonable, but I probably wouldn't have been able to make that expense (twice the price of the starter pack? The additional figures will probably be purchasable for around $30 before long, so that's still $45 for the base in real terms.) It would have needed to be $150 or less for me to pre-order.