This thread reminds me of the trolls in The Hobbit. All this babbling and so little of it to the point.
Here are the numbers which solve your problem: $175 and $375. If the items are worth anywhere near $550, you should be able to resell them for much more than $125. Give the lady back $125, keep the extra. No lawsuits, no bad blood, you get compensated for your trouble, everyone wins. Make sure you know how to advertise stuff.
Dishwasher- This dishwasher is in great shape. Last time I saw a dishwasher like this sell, it went for $175. I want to unload it quickly, though, so I'm only asking $125. Please bring cash and a truck...I've already had inquiries about this, so I can't hold it. Best call soon if you want it- first come, first served.
Wishing well- It's hard for me to get rid of this, but I really need the money. I made it myself. This is the display model I used to show people what they would be getting when they ordered a well from me. It's six years old and still looks great, so you know it will last. I usually charge $375 for these, but I need this gone, so I'll let it go for just $150. Considering the size of the smile on your wife's or mother's face when she sees this in her yard, I think that's a great bargain.
As above, please bring cash, a truck, and at least two or three strong friends- this well weighs about 600 pounds. I am unable to help move these items due to a back injury- you will be responsible for the loading and delivery.
Please note that I cannot hold these items- they must be moved at the time of sale. Thanks, and good luck!