Do any of you use software to catalog, maintain, buy/sell, etc...your collection? If so, what do you use?
This has come up before. I use an Excel spreadsheet that has evolved over quite a few years. Did a search and came up with a number of hits you can peruse. http://www.cointalk.com/forum/search.php?searchid=1474069
I found a free software (freeware) program on the Tucows site that is sufficient until I can justify the cost of a quality program. Do not need to be online to use it either as some require. It's basic but does the job.
Oh, and there was no adware or malware associated with it either. I scanned it before I installed it.