Goodwill Online Ripoff in Overcharging for Shipping and Handling, Internet

I have been a Goodwill Online customer for over two years and the shipping and handling has gotten increasingly more expensive. I have received boxed shoes wrapped in many pounds of peanuts and wrapping. These are donated items. If it weighs 0.1 pound they charge you for a pound. If you complain, they block your bidding. They use expensive freight carriers and make you pay for insurance. It all adds up to a lot of money to the carriers and to USPS. They limit the items they will pack in one box so you are paying extra shipping for nothing. They increase the S and H for an item up to 5% of the cost so even if they throw things in a box you still can pay $30 for 3 pairs of pants thrown in a $1.50 box. There is no reason for this. Sometimes the things are damaged and stained and listed as women's when they are men's or children's.  The shipping should be reasonable since they are donated items. This is a huge rip-off and should be stopped. They are disrespectful of their customers when you phone and ask them to re-weigh a bracelet they say weighs a pound when it doesn't. I am extremely upset with them. I liked the idea of contributing to a charity but now I realize I am being taken advantage of as are other good customers. Now I think they probably bid up the items to get you to pay more and then the biggest ripoff is the S and H. I have brought items to the PO and the PO weighed them and said I was being "taken". If there is a class action suit for this I want to sign on and make them eat their "bad will" for their customers.