For big items like this you usually get more bids with the free shipping, but it is up to you how many points you think your product is worth. Good luck
I am sure that some people can afford free shipping but for a some of us on fixed incomes we cannot afford to pay more than a couple of bucks free shipping, and today I sent out an item that got 101 points, shipping was 3.00 and I paid 7... go figure! If we don't have it, we don't have it.