[hcv123]

The more knowledge you have about it, the greater potential there is to profit in it. I have gone through periods of only funding my collection through sales from it and other times where other monies have been added. I regularly say - there is nothing I own materially that I would not sell (some things that there may not be anyone willing to pay the price at which I would sell it - hence leaving them a part of my collection till then). Many of the items that I collect are in pretty short supply (think between 1 and 20 known examples). I have owned some for a bit of time and in no hurry, only sell when a buyer is willing to meet my price (or close to it after a bit of haggling).