The Tidy House Swap
Here's an egregious example of the swapped out Tidy House silver dollar, replacing the Morgan with an Extra Fine cleaned and retoned Peace dollar. In the 1960s, Tidy House used Morgan dollars, afterbuying several $1,000 bags for its promotion from the U.S. Mint. They did not use Peace dollars. The bait here is that Peace dollars rarely tone, and so the seller plays on hobbyists' desire to get atoned coin for their collections.

To read the earlier E-Sylum articles, see:
QUERY: TIDY HOUSE PRODUCTS AND PROMOTIONAL COINS INFORMATION SOUGHT (http://www.coinbooks.org/esylum_v13n37a14.html)
TIDY HOUSE SILVER DOLLARS (http://www.coinbooks.org/esylum_v19n41a32.html)

The Swapped-Out Littleton Set

The Littleton Coin Company has sold these sets for many years, stored in a velvet case that usually results in rich toning. In the photo above, the bottom set is original; the top set, swappedout. Resist any such set that lacks toning, is my advice if you're looking for original coins.

To read the complete article, see:
The great coin swap: Get wise about online buys(http://news.coinupdate.com/the-great-coin-swap-get-wise-about-online-buys/)