Did some quick google conversions, and those would only cost $50-70 in today's money (basically asked it to convert $6-8 in '65 money, so I didn't look at the cheap ones). For some reason, I'd been expecting them to be more expensive than that. I fitted some old school tire savers to my wife's bike a while back, and, when I took it to the shop, the mechanic asked me if they were just there to make noise. I explained what they did, and I'd just figured they were used back in the day because sew ups were expensive. I put them on my wife's bike because she's not a big cyclist and was hoping to reduce the likelihood of a flat because a flat out in the middle of nowhere would likely turn not much of a cyclist into not at all. Especially if I'm not around to fix it, even though I have all the stuff in her saddle pack.