A little bit of info on the 38. I own 1996 29 Scarab. I have 2 friends that have had them and I have personnely spent a lot of time on both of them. What the heck the HELL of lot smoother in rough stuff than mine. The 96 did not have a lot of problems. Their was some info released of the inner linner of the cabin coming unbonded from the hull, but that problem has been far and few between.
And yes,,they have quit making them. But your boat is older you are purchasing, so warranty is not a factor here. So you dealing with a piece of fiberglass and some motor, which anyone will work on for a price such as others.If your buying the boat with Latham steering thats great. I would not buy a powerboat if possible without good hydraulic steering system. I even had mine added after purchasing the boat. Also it is known that Scarabs are tough enough to handle serious Horsepower. There are quite a few older as well as newer models with some serious ponies in them and they have held up quite well.
The price of 70 is a good price. With that size of a boat I would pay to have it surveyed if your seriously interested. They need to check moisture content and stringers ect,, The boat is a great solid riding boat in the roughest of stuff. We have run in 5 to 7 footers in the Gulf of Mexico. I personally am going to a 38 in the next couple of years myself.
I was looking at Scarabs and also Cigarette Top Guns. The reason for a Top Gun is resale value has shown to be better. Scarab does pretty good also but not as good cigarette. So due to the size of the investment I want something that will help me out on resale just in case I need to sell.
This has just been my opinion so I hope noone slams me for it. I'm sure you'll get some more info on from others on this. Good luck on your decision!