Ok, I love to give my opinion. No way any boat sole should be anything other than perfectly flat. Something is wrong if it isn't. I'd want to get down to what is going on there but If I couldn't, I'd move along to the one of the other hundreds of them available. One of the big downsides of the early 2000's small Crownlines is that they lagged behind on when they added snap in carpet. For that reason alone, I wouldn't take one for free if you told me I can't immediately sell it.
As for weight, here is my take on these bowriders having boated for 43 years and living at my lake home each summer where the majority of boats are garage sized. The dry weight speaks volumes about the construction of the boat. Your subject Crownline at 18 feet is nearly a thousand lbs lighter than my previous 18 foot Chaparral with a v6. If you lined up just specs on a sheet of paper, I could pick out the higher level brands just on weight and gas tank size alone if we are talking garage sized bowriders. The extra 1000lbs plus the fuel in the larger gas tank gave that 18 foot Chaparral a nice ride. Those early 2000's were big change years for many bowrider manufactures where some retained their 90's construction methods and others took a generational leap forward with much more limited wood usage, standard glass floor, plastics instead of wood in various other areas and flow through types of materials that are impervious to rot in cushions as a start. Also 2002 was the year that small block v8's and v6's came out with MPI Engines of which as odd as it sounds, I see more small 2002 and up Crownlines with the MPI engines than other small boats of other brands for the first few years. In other words your 2000 Crownline is a couple years shy of having the possibility of the newer technology engine with more HP.
As for weight, here is my take on these bowriders having boated for 43 years and living at my lake home each summer where the majority of boats are garage sized. The dry weight speaks volumes about the construction of the boat. Your subject Crownline at 18 feet is nearly a thousand lbs lighter than my previous 18 foot Chaparral with a v6. If you lined up just specs on a sheet of paper, I could pick out the higher level brands just on weight and gas tank size alone if we are talking garage sized bowriders. The extra 1000lbs plus the fuel in the larger gas tank gave that 18 foot Chaparral a nice ride. Those early 2000's were big change years for many bowrider manufactures where some retained their 90's construction methods and others took a generational leap forward with much more limited wood usage, standard glass floor, plastics instead of wood in various other areas and flow through types of materials that are impervious to rot in cushions as a start. Also 2002 was the year that small block v8's and v6's came out with MPI Engines of which as odd as it sounds, I see more small 2002 and up Crownlines with the MPI engines than other small boats of other brands for the first few years. In other words your 2000 Crownline is a couple years shy of having the possibility of the newer technology engine with more HP.