just some friendly advice. you will have a hard time selling this if shipping is not free. Reason is because without any feedback , you are expecting somebody to pay for shipping up front with a high risk of having a new seller never sending the item and keeping the shipping $
So if it goes over 6000, you will do free Shipping Right? I work at post office and I know that you can send that out way cheaper than $24-30. Especially if you use a FLAT Rate SM box which is under 6 and same goes with a Padded flat rate envelope. (You get 3 flat rate Padded envelopes ,which are free, and wrap the HD in two then put the m into the 3rd. But back to original Q, you stated earlier that if price went over 6000 you will ship for free, correct?