Most of the interviews took place at the onset of the probationary period. The survey questions focused mainly on the 6-month period before the onset of probation. Results revealed median net earnings of $721 per month from drug sales; the 37 percent of the participants who sold drugs daily reported a median net earnings of $2,000 per month. These figures compare with median monthly earnings of $800 from legitimate employment for the 75 percent who reported such earnings. Results indicated that street-level drug dealing appears to be a complement to rather than a substitute for legitimate employment, and it appears to be less profitable than median reports would suggest. Tables and 5 references (Author abstract modified)