I get the magazine from the Antiques Roadshow, and it says more or less the same thing.
My Grandma had some nice things, such as the big windup record player about waist high, but she had worked so hard all her life that as each new thing came around and her kids would buy it for her, she either gave the old one away, or more often, stuck it in the back of the barn (OUCH!!!)
Would I pay a thousand dollars for an old sewing machine? No, of course not, when they go for 500 down to 5 dollars, which is what they were worth to their owners. What they or it may be worth to me or you is something else entirely.
Would I buy a pile of old fabrics that look like the feed sacks from my childhood? Yup, in a new york minute, especially if it had my childhood beloved little red roosters on it. A sunflower on a feed sack, no, but someone else might fight me for it.