<span style="font-family: 'trebuchet ms', geneva; font-size: medium;">Speaking of the value of old machines, and teaching young people, it is VERY important to keep a good "poker face" when finding a treasure at a thrift shop or yard sale when its price is shockingly low. You do not want to gasp, faint, get the vapors, scream, do the touchdown dance or anything ... not even a faint gasp or "Oh my." You say, "Cool, thanks, I'll take it," and then get the hell out of there. Otherwise, that old piece of junk they were about to throw out will become a rare, priceless, irreplaceable artifact worthy of display in the Smithsonian, and, of course, worth a fortune. "Been there, done that, don't have the t-shirt and don't have the vacuum cleaner either because I told the greedy seller where he could stick it!"</span>