Domain investor @Mike Mann is the owner of several hundred thousand domains. All domains in this portfolio are available to buy through his company DomainMarket.com, with prices ranging from three to seven figures. With such a large portfolio, Mike's renewal fees are likely to be astronomical and regular sales must be needed to support the portfolio. Through Twitter, Mike is very open about his domain sales, regularly posting his sales prices along with his acquisition costs. In this article we're going to take a look at the domains that Mike has sold in 2018, which have been revealed on his Twitter page. Total Domains In 2018, Mike tweeted forty-four domain sales from his company. Given that Mike's portfolio runs into the hundreds of thousands of domains, it's likely that there are far more sales that haven't been revealed, possibly at lower prices than those revealed via Twitter. The Sales Price These forty-four domain sales totaled $915,546 at an average sales price of $20,807 per domain name. The most expensive domain was CryptoWorld.com at $195,000, which reportedly sold to cryptocurrency exchange Binance. The least expensive name was a blockchain domain, AcademiaBlockchain.com, which sold for $4,000. In total, there were twenty-five domain sales of $10,000 or higher, with the remaining nineteen selling for four-figure amounts. The median sales price was $14,888 with the mode being $9,888. The Acquisition Price According to the data released by Mike, we are able to calculate that the total acquisition price for these forty-four names was $13,033 with the average acquisition price at $296. That means that without taking renewal fees into consideration, Mike's average return on investment on these forty-four names was 6929.39%. The most expensive acquisition, accounting for over half of the total acquisition cost was RentalsDirect.com at $7,500. There was only one other four-figure acquisition and that was VideoDesign.com for $2,700, a name that Mike sold for $50,000. There were multiple examples of domains being hand registered by Mike, with eighteen of the names displaying a purchase price of either $7 or $8. The Extensions All but one of the domain names sold by Mike in this list were .COM domains. The only name that bucks the trend here is ChooseLife.org, which sold for $8,500 after Mike purchased the name in 2005 for $350. Last year, Mike successfully sold RiseUp.org for $75,000 in the seventeenth largest .ORG sale ever, according to NameBio. Domain Length It may surprise you to learn that the majority of Mike's sales on this list come from longer names of two words or more. In total, ten domains on the list were under ten characters in length, with Kugga.com at $26,888 being the shortest. The longest domain was IndependentSolarEnergy.com, which sold for $7,250. The average length of a domain on this list was twelve characters, not including the extension. Twenty-six of the domains were two-word names, with ten being three-word .COM's. There were six brandable domains that can be classed as one-word names on this occassion. -- When writing about Mike Mann, one must always include a caveat that this business model of mainly registering domain names and selling them for four and five-figure fees is difficult to repeat and highly risky. Mike's sales are extremely impressive, but they need to be in order to successfully sustain this business model. Below is a downloadable PDF file containing all forty-four of Mike's sales from 2018, taken from Mike's Twitter feed.