I've seen this boat on ebay several times - the first time over a year ago - see my post on this thread, the original ad is still viewable - and then again in January this year, and again in March and again in May.
They are quite a good design if built properly - trouble is, most Roberts steel designs are home built, and quality is highly variable. Doesn't say who built this so almost certainly home built. Usually I don't bother with surveys, but I would with this one.
Given how long it's been on the market, and if you're interested, I'd try a substantially lower offer.
Edit: I note the guy is still insisting it's a Roberts Spray - having always been interested, and having built a steel Roberts Spray 33, I can assure you, as I did him, it's not.