35 years was the combined maximum possible sentence. There is no such thing as "street value" of sentences.
During sentencing (if he was found guilty and accountable) is when the judge or jury decides on what punishment is dealt, CAPPED by the maximum. In white collar crimes, it is rarely if ever give the maximum sentence.
He was caught doing a similar stunt prior to the JSTOR incident, warned that what he was doing was illegal.
He trespassed onto MIT campus (he was not a member of the MIT community), trespassed into a building, trespassed into a network closet, installed unauthorized equipment on the network, subverted their access systems, subverted blocking/tracking attempts by MIT network operations, downloaded documents at a rate so great it made JSTOR servers inaccessible, subverted JSTOR's attempts to block him to the extent that JSTOR had to block large sections of the MIT campus, and then installed a second laptop when he wasn't getting documents as fast as he wanted.
JSTOR's fee pays for archiving, indexing, and data transmission. Bandwidth, power, servers, and administrators do not grow on trees. They are not "paywalling free research."
He killed himself because he had a history of mental health issues, proven by among other things publicly discussing the appeal of suicide.