I would say not specifically just drive around looking for boats. But if you do see one for sale, then stop and chat and look. Look up ads, make plans to go see them after emailing or texting or calling. Then go look.
My neighbor's condensed story...:
Late February 2017, They had a list of boats to look at and also a couple of dealers to drive by on a Saturday. They went by an individual's house after browsing at a dealer to look at one. They were not home but they looked at it as best they could. A guy was driving by and asked if that was their boat, they said no they were looking. He said he had one to sell right around the corner or so. They followed him to a very nicely kept 2001 Crownline deckboat 24', and looked it over, was a super nice boat. He was asking $17, they had a hard budget cap at $10k. He went down to $15k right there but they had a hard $10k limit. They exchanged numbers. They looked some more, then after they got home he called and said $12k. They had to decline. The next day he called and said can they do the $10k that day, they said yes. Turns out he had to move due to his job in about a couple of weeks. Once he added up all the logistics of having not sold it in time, yada yada he had decided to take their offer. This was in late February, it booked out at over the $17k even. They would never have been in this deal without having been out there looking.
My story, not quite as lucrative but still got it at about 25% below market, again late February 2017...:
On the same day I looked at a 2007 Glastron MX17, A 2011 Bayliner 21 foot Discovery bowrider, a 2006 Sea Ray Sport 185 and a 2002 Bryant 188 (although the Bryant was not on my list). All were about as nice as they could be, some Mercs, some VP's. The Sea Ray was last. Before we started on the Sea Ray the salesman said he had another to look at if I had the time and didn't mind, I said sure. The Sea Ray ended up being very nice, I would have bought that one. Then we went over to the Bryant. The Bryant stood out like College grad amongst middle schoolers. I would not have "met" the Bryant had I not been out looking. The wholesaler I was working with had been contacted by a Cobalt dealer about this Bryant they wanted to wholesale out. The wholesaler checked it out and took it just that day. It still had beads of water on it from the test drive. I jumped on it, never had a chance to hit the open market. My purchase was contingent upon a test drive of may own, and had them keep the Sea Ray as contingent. The Bryant deal worked out, took about a week and a half to clear the test drive and then titling.
I had been out looking at 4 or 5 others before this.