I purchased a small boat from Ebay and had only seen pictures of it. Boat had to travel over 800 miles without my checking serviceablity of trailer or securing loose items personally. While I've towed boats and travel trailers many hundreds of miles, I've never hired anyone else to do the same job. They were able to answer all my(many) questions before making the deal.
While the cost was close to the purchase price of the boat, it was less than some other bids on the job.