Those old Hatts are solid glass hulled and really overbuilt as they weren't real sure about fiberglass technology back then. A friend of ours had a sistership to that one. For a 34'er there is a lot of room inside and out. His had gas Chryslers in it and he'd cruise at about the same 8-9 kts. but I'm sure used a fair amount more of fuel to do it. He was a canvas/upholstery guy so he was able to do all that himself. He painted the hull with one of those 2 part epoxy brush-on applications. It came out pretty decent, he could have faired it a little more but he was happy with it. He sold it two years ago to buy a single diesel trawler and got $18,500 for it. The market has dropped for boats in the 30+ range, especially old heavy ones.

It all comes down to your DIYability and your expectations. Interiorwise it sounds like there's just a lot of sanding and varnishing to do. If you want the hull painted it'd probably run you $500-750 with one of those DIY systems and a LOT of labor, $7000-9000 if you want it professionally prepped and shot with Imron/Awlgrip. Mechanically it sounds like it's in good shape.

With an eBay auction, time is of the essence. But I'd see if the seller would make the sale contingent on a professional Marine Survey if you're high bidder. They can uncover lots of hidden joys like water intrusion, blistering and delamination as well as making sure those diesels aren't on the verge of self-destruction.

If your looking for a water condo or just need that much cabin space it's a lot of boat for the money. In my case I'd be worried about kids up on the decks with little more than a rail, if your kids are older or if you don't have any, that's obviously less of a concern.

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)