1-18?
Hate to burst your bubble, but I don't care for the GM 1-18's, and I'll stand by my statement of barely above average. I worked on them when they were still in warranty, back in the mid 70's. Our shop never had less than 2 or 3 of them in at a time, all for leaking water, and taking out the transmission bearings. Poor design, IMHO, with the use of the bellows seal. Great wash action? Yes, but at what cost? One running change they made is to put a plastic diverter tray above the motor. That's so WHEN, not IF it would leak, it wouldn't take out the motor. I would bet they paid out as much in warranty repairs, as they made in new sales.
Repair people will look at you with glassy eyes, because it's near impossible to get parts, and most of the machines have been scrapped by now.I haven't seen one on a trade in pile in many moons. Ask anyone who's been in the business for years about them, and the matching dryers. Cheep, cheep, cheep!
If someone got 20-30 years out of a 1-18, it was the exception, not the rule. 20-30 out of a similar vintage Maytag, or a BD Whirlpool? Happens all the time.
GMFrigidaire refrigeration? Some of the best.
My opinion is given freely, value accordingly.....
kennyGF (proud graduate of Frigidaire training school 1976)