tracking your collection

Keeping track of what you buy and sell a coin for is very important. Not only for your own knowledge - but the govt. wants to know too. You got it - taxes. If at some point in the future the IRS starts asking questions - you better have answers

By the way - I use Coin Elite. It has everything you could ever want including pics. And you don't have to build the spreadsheet - all you do is point and click as all the coins are already in the program. And pics are an important feature too. Not just so you can share your collection - but so you can identify your coins in the event they are ever stolen. Been there done that too