There is some confusion surrounding pricing of older vintage weapons. Some of you may not have been into gaming and/or trading TF2 since it first started around Fall of 2010. The original group of vintage weapons/hats/miscs has been around since that time, anything obtained prior was made vintage quality. There was a second group of vintages from the Australian Christmas weapons where Valve lowered crafting recipe costs and made all the previously crafted versions vintage quality (as well as Shogun 2 and RIFT weapons).
The first group of vintage weapons, known as the "old" vintage weapons are fairly common. The only exception being Vintage Crit-a-Cola which sold for and continues to hold its value at around 1 refined each. There were some other weapons that were slightly more rare (but none near V. Crit-a-cola's rarity) like the V. Dalokohs, V. Skullcutter, V. Southern Hospitality, and V. Pain Train but generally these items have sold for a standard 1-2 scrap each. And then there is the ever-popular V. Huntsman but this item is not rare.
Now we see some industrious people with outlandish prices for V. Bonk, V. Dead Ringer and others. You are welcome to pay whatever you want for these items but they are not rare. If you shop around you will easily find these items in the 1 reclaimed metal range. The point is don't go into debt over items that can be easily picked up on the cheap.