Getting a friend or anyone to do a sham bid isn't slightly unethical, it's completely so.
But, yes, a completed auctions search will give you a good indication of ultimate "value", and perhaps more importantly, demand. If there are few auctions that actually complete, you'll know what to expect. If demand is good, and you don't have a certain price you need to cover, throwing caution to the wind and starting at .99 is a good strategy. Interested buyers will get it to where you want. For items that have good demand, no bids or low activity even a few minutes before the close is not a good indicator of the final price. I've seen prices of stuff triple or more in the last 5 seconds of *bay auctions.