WASHINGTON — The Cash for Clunkers buzz is starting to wear off and it seems that some buyers are having serious second thoughts about getting on that government-funded bandwagon, according to a new survey. In the meantime, the U.S. Department of Transportation said that dealers by Tuesday's deadline had submitted a final total of 690,114 Cash for Clunkers deals for $2.88 billion in rebates. The total is just under the revised $3-billion budget for the four-week program. The new survey by CNW Purchase Path, of Bandon, Oregon, finds that of nearly 1,000 Cash for Clunkers participants, 17 percent say they...