No it not you, they are crazy but they are out there on ends of extreme.
Well it take all types. I had several self propelled mowers here for sale that retailed when new for near $300. I had restored them to good working order including new blades. I was trying to sale them @ $75 each with a 90 day engine warranty. The best offer I got even for one of them was $20. Of course I turn it down as I can part them for more than I was trying to sale the whole mower for which I been doing. After I quit selling equipment, I have had several asking if I had any equipment for sale. I even a had one that turn down a $50 mower with a 90 day engine warranty to only a $30 mower off someone without a warranty and then spent another $45 with me repairing it. The kicker is he still thinks he saved money.
The rider that I had for $425 including taxes was pull offline for my own use and I have upgraded the 16.5 hp to a 21 hp as needed a more powerful 42" cut mower as my grass tends to get out control during my busy season. I took it for a test mow last Sunday and it was cutting heavy 12" green grass down to less than 2" the full width of the cut with only a slight loading of the engine except when I over loaded the deck with grass clippings. It also was mowing 36" dead weeds with some green grass also down to 3". So I am pleased with the mods. The only problem is small fuel tank but there is no more room under the hood expect for the factory tank. I cut about 3 acres on two tanks. I do better on shorter grass as the engine be running off the idle ports more.
