There are 2 hobby stores in the Syracuse area that carry the 3' K&S wire. There are also several Ace Hardware stores that will presumably have the same wire. I'd definitely buy from one of those sources rather than taking a chance on Amazon.
And I would patronize the local stores first also, if I wasn't in a wheelchair. I can't walk through a store looking for stuff, so Amazon has been a boon to me. After shopping with them for a while now, I have had only one return, from a third party supplier, on something I thought I was getting a deal on. As to piano wire, if I order K & S from Amazon, that's what I get. In K & S packaging, not bent, and not rusted. At a price very close to what it is in a brick and mortar store. Free shipping. And more often than not, I get it the next day. I'm smart enough not to let politics drive my shopping habits. I go where I get the best service. The exception is hobby items. I like to buy from the local slot track or model train store if I can. (again, they need to have mail order service) But I haven't been doing much building lately, so the hobbies have stagnated. Something I hope I can change.
P.S. The shipping isn't actually free. I pay $129.00/year for a Prime subscription. For the free shipping, I could care less about their promotions. On average, I order from Amazon five times per month. And the shipping would average out to about $5.00 per delivery. That is $25.00/month, or $300.00/year. Plus I get free music downloads, and free Max streaming. ( I don't use the streaming, since I have the Max bundle as part of my cable service, and the programs are the same.)