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I think you answered your own question. If it's that hard to find any information on an agent, it's probably wise to give them a miss.
Plus, his bio (advertising by day, writing by night) doesn't inspire confidence.
You can still find his old page on the wayback machine, where he appears to have quit the business some five years ago. His webpage said this at the time: "Unfortunately, I will no longer be accepting manuscripts for representation. I am now offering editorial services to authors and publishers." And then he pulled the page after a year, so perhaps he’s not doing that either.