Welcome... I am not overly familiar with the Pro 850, but just a word of caution... The 1010 your friend has would have been a Zodiac Hurricane. This is a very heavy duty, commercial/military boat. My boat is a MUCH smaller version, but most of the Hurricanes are similar in their design.
The Pro series is a "sport boat" for lack of a better term. Still a good boat, but it will perform much differently than the 1010. For one thing, it will be much faster, and more fuel efficient. On the other hand, it won't handle rough water the same way either. And it will be a fraction of the cost of a Hurricane.
I don't know for certain, but I believe the toobs on the Pro series are Strongon or PVC, rather than Hypalon. This makes them less durable, less repairable, but also less expensive and lighter.
I know people with a Pro 650, and others with a 550 and also a friend has an older Bombard which, looking at the pics of the Pro, may well be the Bombard re-branded, although that's a guess at best. If so, the hull is a very different shape than the Hurricane as well.
I don't say all this to dissuade you from shopping for a Pro since it's probably a terrific boat. I did want to point out that it isn't a Hurricane 1010 though, so make sure you test drive the Pro before you commit. It will be very different!