Welcome to rib.net Markl,
I have Ribtec 645, they are a very good boat, mine is a 1994, with twin mariner 90hp good for 42kts, the one you are looking at looks identical to mine apart from i have bench seating all the way through, and my hull is yellow and tubes are blue which looks nice
. Mine was custom built with large fuel tanks and live bait tanks, in deck rod holders, and that sturdy sampson post up the front which is exelent for tying up, there is not much to look out for the are pretty solid boat! Iv owned mine for 5 year now and have done about 5000miles in her, the seas off Jersey and the french cost can often be nasty and she copes very well. If you are going out in this black one you will soon see that she is heavy and positive in the water, if its anything like mine the tubes are in the water at rest giving it grate stubility at rest. Go for it but think the price is a little high, I considered selling mine a while back at about £12k ex vat.
Hope you have fun trying it out, let us know how you get on.
You will not be disapionted they are briliant boats!!!
Shame they dont make em like they used to.