Open your eyes, this is perfectly normal. Yet for some reason everywhere I go its always the same. The people who should know the most turn out to be the most oblivious. So let me explain it to you.
Its not that the receivers or whatever are so great. Its simply that they have endured. Whatever lasts and is kept in good condition, it hardly matters what it is, its value will increase over time.
A customer came into the shop one day with a snuff box. Ordinary run of the mill snuff box. Except it was a couple hundred years old. Appraised mega.
Guys into Porsches, try and tell them its not the model or how scarce or special. No matter what it is price depreciates for about 15 years, bottoms, and then starts going back up again. My 1979 911SC was $25k new, depreciated to a low of about $10k, now worth at least $30k. Same car.
Had one guy try and argue, went looking to prove me wrong. Went looking for one of the worst cars ever made, Chrysler K-car. Absolute piece of junk. In no time flat found they sell for more now than when new. Unlike certain people here he was man enough to admit he was wrong.
People see value in things able to endure the ravages of time. Its not nuts. Its commendable.