Yea, the pricing can be really weird....... I collect records, and went to a sale run by a lady who has been to a lot of estate sales, but never ran one before. She was a friend of the family of the gentleman who has passed away. And most all the items were priced very high, at "retail" or more. If someone complained about the pricing, she said "In two days, everything will be half price" (how nice of her).
After picking through the records and CDs, I found one album that would sell for about $20. Right behind the boxes of records and CDs, there stood three different Lockheed Martin plastic spaceship & rocket models (this person was an engineer for NASA). Of course, I immediately scooped them up, even though they were not priced.
Went to pay for everything, and asked how much the records were. The lady said "wait a minute, I have all the prices for the records written down on this pad of paper- I looked them up on ebay".
I then said "if you looked them all up on ebay, I probably wouldn't be interested". She then found the price on the album. "Eight fifty". Of course, LPs sell for 50 cents- $3 at most every sale. I politely told her that I would pass on the record.
So I then asked her "how much for these three toys"- they are actually very rare "contractor models", only given to certain people involved with the space program. She said $15 would be fine. I offered her $12, and she took it.
Sold the three models for over $1200 on ebay, and I also went back inside and picked up some other NASA items that sold very well. She obviously didn't take the time to research everything in the house!!