If this were the case I'd be selling basic 314's for over $100, and it's not happening. Sure, a nickel-band 1980's 314 might have sold for $60 three years ago, and today a silver band 1950's 314 is going for over $100, but while it looks like the same pipe, it's not the same pipe.
But there's no point in arguing it. I know what I paid for my pipes and I know what they are selling for now, and what I'm paying for similar pipes today. I've been buying/selling collectibles on ebay for 23 years, so not my first rodeo.