With Auctions and Best Offers, you do have the opportunity to remind customers that this is a local pickup only sale and give the dimensions and weight of the item.
Sometimes the seller has to take responsibility into his own hands.
Of course, it would also be an option (a stupid one, but an option) to add some wildly overpriced shipping fee to the listing. If it isn't paid, because the item is picked up, you don't have to pay the shipping FVF.