2007 Lexus GS 350 Lifters are Loud

I just purchased a 2007 GS350 it has 9,105 mi. I noticed the engine sounds loud. I brought the car in for some minor repairs and mentioned that they should look at it. I was told that it's the way the lifters sound on that particular car. I owned a 2005 RX a few years ago and it didn't sound like that. I don't know how their supposed to sound and I think they may be trying to pull one over on me. I think I may have a bigger problem on my hands. Please advise?