To address your original question, Trainz did a good job for me. I purchased a pretty large collection a couple of years ago and while it had some really nice items, there were also quite a lot of items that would be difficult to to sell. Trains came by the house and loaded the group of around 300 items that I just needed out of the way. Over the next couple of months, I received a check each week for items were sold that week and a list showing what was sold and the price it sold for. I was surprised how much it all added up to. (sometimes it is best not to look at individual items but just the total amount).
If one can be realistic realizing that any company that will take on the task of reselling your trains will have a lot of overhead and should be expected to make a profit, then getting about 40 to 50 percent of what an items actually sold for at an online auction is not that bed.
Based on my experience with Trainz, I would give them an EXCELLENT rating.
I have also instructed my wife and kids that I intend to enjoy my trains as long as I can and that once I am gone, there are companies that will come in, pack the items up, take them away, sell them and send them a check! And if they only receive 10 cents on the dollar, by **** that would be 10 cents they would not have had.
Happy railroading,
Don