You do not need to be a rocket scientist to realise that when you buy a new boat (whatever the make) the depreciation is quite large up to 35% (and more in some cases - i.e. companies that have gone bust, boats that have bad reports etc) for the 1st year. If you intend to keep the boat for a long time (say over 8 years) it worth’s your while to buy a new everything RIB.
If you buy second hand and you keep your boat for a long time I don't think that you will lose in the long run. Say if you buy a 2nd hand , 1/2 year old, 8 mtr Scorpion, with low hours for about £35,000 (they sell for about Euro 40,000 in Europe 2nd hand) with a 250 bhp engine on it, trailer etc and you sell it after say 4 years, the boat has fully depreciated (banks say that a RIB is fully depreciated in 5-6 years time) and you sell it for say £15,000-£18,000 then you made a profit on it.
Is a difficult choice. But in my view buy a big RIB rather than a small one (even if it is 2nd hand)