I can sell you $5,000 worth of bitcoin with a simple cash deposit at any major bank such as:
Bank of America
Chase
Wells Fargo
Citibank
US Bank
PNC
You will have the bitcoin in your wallet the same day as the payment (usually within minutes after proof of deposit has been supplied).
Here is an 18,000 view thread discussing Bitcoin-Brokers if you are not already familiar with the service:
https://bitcointalk.org/index.php?topic=237164.0Thanks.