Guys, value plays a big part in the market today. The term "no Low Ballers" is a way to ward off tire kickers and hone into people who are serious, because the boat owner knows they have built-in "value" into their rig. The days of listing it up too high and allowing them to negotiate you down, are a thing of the past and really savvy sellers and buyers will know if the boat is priced right according to what the market for what they have into it (less some depreciation), according to what it is, the value of it, the condition it is in and what the buyer's needs and what he considers "value" to them. Otherwise, if people list their boats up too high, it will get overlooked. If they list it too low, people will know there is a problem with it and to look, but air on caution.
As someone here said on this thread, do your homework. Book prices can be tossed out the window, because a seller can have add-ons and features on the boat that can cost as much as the boat itself (i.e. custom trailers, electronics, power poles, jack plates, push poles, high end batteries, trim tabs, casting platforms, upgraded outboards, low hours, custom boat covers, upgraded trolling motors, etc.). Also how it was stored and maintained can be the difference on the over-all value of the boat.
You can take a look at all those values, the condition of the boat, then get a feel on it, if the seller is negotiable on the price or not, based on his/hers motivation to sell it or not, without insulting the guy because you just threw out some low ball offer. In today's market, there are many boats that are priced right (especially well maintain used skiffs, like with many who frequent this website). In other words, you may lose a good deal on a boat because you are brow beating a guy on the price, while the next guy is finding that boat to be a good deal and he's ready to buy it.
So do your homework/research/legwork, ask people "in the know" and know what you want and the values of what it offers and see if you can meet the guy in the middle of where you can both agree on, and that's when you know you have a deal or not.
Ted