For a period of time the rear engine Snapper riders were the most popular mower around my area of the country. For good reason, too. My wife's parents had an ancient Snapper that other than having had the engine replaced a few time over the years, just kept on trucking. From what I've read, Snapper is now owned by Simplicity, since 2002.
I bought mine new in the mid-80's, it had 11hp Briggs IC engine, 33" single blade Hi-Vac deck, w/grease fittings everywhere. At that time I was mowing 2 +/- acres with it and it did fine but was pretty slow going with just the 33" cut.
Good sturdy built mowers, the only major complaint I had with mine was it wore out at least one, sometimes two drive belts a season.
Snapper made an entry level model rider with a 8hp Tecumseh engine that was priced a bit less than their Briggs engine model. Walmart sold them for two or three years but no longer do - here's why
The Man Who Said NO to Wal-Mart.
Come to think of it, I don't see any where near the numbers of Snapper mowers around here as there used to be, no idea why, though.