carrier bearing

I found out that a vibration from the underneath of armrest when everytime I hit accelerator. I took it to the a local service store, The mechanic said the carrier bearing went bad, they told me that I need to replace the driveshaft. Cost me $ 1500(include labor+tax) the part charge me $1100...

Just picked up a "new to me" 05 V8. Called and got the service records, and it shows that the driveshaft was replaced at 38,000mi. While driving it for the first time last night there was a moderately violent noise (loud thud about 10x in a row) and then the "sqeak/flutter" I've read so much...