I guess it was a slow news day in Chicago, because they ran a story about 1970 dated quarters having a small error, which makes them worth $35,000. They actually encourage people to check their change. Here's a link to the story:
http://abc7chicago.com/finance/misprint-makes-1970-quarter-worth-a-ton-of-money-/1374171/
The reality is, a well known error dealer Mike Byers, is offering a 1970-S (proof) quarter struck over a 1941 Canadian quarter on ebay for a Buy-It-Now price of $35,000. Here's a link:
http://www.ebay.com/itm/1970-S-Proof-Washington-Quarter-Struck-on-1941-Canada-Quarter-NGC-PF-65-/271924283587?hash=item3f4ff348c3:g:RDoAAOSw~gRVnLYU
The coin was originally discovered by Fred Weinberg (another big name in US error coins) back in 2001 when he purchased roughly 350 error coins from a California Controller's Office auction of unclaimed property (they were the contents of a safety deposit box). The US Secret Service was called-in to determine if the coins were legal to own, because there is evidence that San Francisco Mint workers were intentionally making errors and then smuggling them out back in the early 70s. Bottom line, the Secret Service said they were OK to own, and Fred and his partners sent them off to NGC for authentication and slabbing. (The real oddity in the group is actually the only known authentic two-tailed quarter.)
Fast forward to today, this one of a kind coin is being offered for big bucks on ebay, and there's no chance you can find one of these in change!