I don't know the exact figures but I recall reviewing one of SEDO's reports one time and estimating that only one in 1000 domains on their platform had sold in the last year. I believe the median sales price at SEDO is around $600. Given that parking income is relatively small for newer domainers, a sell through ratio of one tenth of one percent would mean a considerable negative cash flow for the typical domain portfolio. Many students go into fields like business, information technology, engineering, medicine, law partially motivated by the healthy salaries which professionals in those fields earn. Many are attracted to domaining because of the DNJ sales reports of five and six figure sales. However, the reality for most industry participants is much different than those who started 15-20 years ago.