shopgoodwill.com Good Will ABSURD shipping rates (inflated WEIGHT of many items) Internet

I will add to the detractors who have been citing shopgoodwill.com.  Regardless of how bad working conditions are, there is blatant lying going on.  I personally have not noticed the alleged shill bidding, but I have noticed that item weights are ABSURDLY inflated.  Here is a hard fact example.  Right now, as I speak, there are two identical keyboards listed on the site.  They are Yamaha PS-20's, rare early 80's home keyboards.  The first one listed includes a hard case, which would increase the weight of the item.  The whole item is listed at 21 pounds.  It is listed as coming from the Eugene Oregon store, or Goodwill Industries of Lane & South Coast Counties, item #12089050.  Hard to believe, even with the hard case.  The second PS-20 listed does not include a case, which would mean that it is lighter than the first.  However, it is listed as 48 pounds!  This listing comes from Toledo, OH or Goodwill Industries of Northwest Ohio.  That's right, 48 pounds.  Let's be clear: 21 pounds is an overcharge.  How about 48?  Item #12085453.  

Is this illegal?  This is a fairly common phenomenon on the site.