The simple and truthful answer probably is that I am old and inefficient
But let me expand a little. I like to analyze and for each domain I consider I typically look at many factors including who would be the categories of end users, what value proposition would this name have for them, what are the close competitors, what prior similar sales (both in niche and in extension) have their been, search and advertiser statistics, automated appraisals, trends, was it held before, did it have an operating website or abuse if it was, etc. (
some of my considerations in this post).
I consider carefully probably 5 to 10 names for every one I hold. Also, while I register for multiple years a few well over half of my names I only try for a single year so if my portfolio is 300 held, at least 160 are new each year, and for those 160 I analyze 800 to 1600 possibilities. It is just me
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Also, I like to do a written document of key facts for each domain, and share a portion of that on marketplace listings. I am not sure if this works, it may even be negative, but it is what I do.
I plan to be more efficient, but right now I use a combination of a spreadsheet, text documents and written notes for all of this information. Not efficient!
I also find the marketplace interfaces not as efficient as they could be. I find it easy and fast to put domain names up on Undeveloped, but between their verification TXT record, adding the domains, doing the category and description, and then changing the category if I hate the picture they put with the one I chose as the primary, I find Sedo really time consuming. Afternic I find a little better, but still takes time. I am surprised how many names I want to add someone has left in Afternic so I have to go through support to get them taken down so I can add them. Anyway, I rant....
But the story of why I can I think comfortably only handle less than 200 in my portfolio. Thanks for asking!
Bob