Thanks for your response QSR. I would have replied earlier than this, except I have not been well, but now I'm OK.
I too have heard about the Facebook comments, and I do tend to agree with you regarding rip-offs. All of what I'm saying below on this topic--is "old hat"
My present SB Model 45 17" was purchased from them roughly 12 years ago. and at the time I got them to replace the original cylinder for a brand new 7 bladed one [Black in colour], which was then lathed as was the new bottom blade, and then adjusted to give a perfect match. It came with a Vintage 1977 B&S -- 3 HP, Model 80303 08339-01 77061001 engine on it. [See attached pic and you will be able to see the original B&S red paint, under the Black paint over-spray.] From memory, about AU$1,700 all up and delivery was free.
Suddenly, about 18 months later, the engine siezed for no apparent reason. It had the correct amount of oil, a brand new spark plug, and I looked after it well. I'm still in the process of slowly dismantling it [as time permits], to try and discover what went wrong. Also, finding the Manuals -- Operators & Exploding Parts, has proven to be next to impossible! When completed, my findings will be the subject of another post.
So, in essence, I ended up with a AU$1,700 mower without an engine. However, I can say that the back split-rollers, twin rails, clutch assembly, chains & sprockets, front roller, cylinder, nuts & bolts and catcher etc., are all still in first class condition, with no signs of rust, or dents, including beneath the side cover.