It often does, especially well know firms that are vintage, hand made firms that made a great product but went under for some reason.
About 14 months ago I got my hands on a 72 Campagnolo; fram, rims, seat post, bar, rizer and head badge all intact. I dropped about 2K into the bike and took down to someone in Italy who could do a match paint job from that bike; his shop ended up offering me 9,400 for the bike so I sold it; they finish the restoration and got 27K Euro for it.
I rarely ever sell my rigs, especially such a rig, I had a spot picked out on my wall for that one; but I am returning to the US soon and I just purchased 4 new Quatro´s and I am having a custom one built that is running me close to 31K. I also sold off a few extra velomobiles that where either raced out by now or extra ones.
Really just depends on what you have, this sign is sweet but to me it is like Aprilla; if it buffs out properly and the LEDs set up is done right then I would not be shocked to see it go between 200-400 bucks.
Some things are just more desired in their aged form, other things just need to go retro before they appeal enough to turn a good profit.
i thought originality sold?