This guy IS a criminal. He'll take your money and laugh all the way to the bank. Sherman Schultz is an alias. There are several people with considerable financial and technical resources that know who and where he is and are close to putting his scam to a permanent end. Do not under any circumstance give him a dime.
Yes, highly likely its a scam be careful!!! A simple search will turn up the same ad placed in Phoenix, Chicago, San Diego, Sacramento, etc... The same ad with occasional changes about the 30K since December or October. The ad is for a website called: FastAdsPlus.com Phone: (800) 483-6037
I replied to the ad, looked through the website, and it is indeed real. I had my tech guy go through it last week and he said it worked great. I was actually in the process of purchasing it when someone else bought it before I could. I'm still bummed about it!