I don't recall where this is from... but it'll be outdated after salary changes... still a good guide i guess:
(What potential can translate into)
Bench warmer - 8k
role player -13k
6th man - 15-17k
starter - 21-24k
star - 33-40k
allstar - 40-65k
perennial allstar - 80-100k
superstar - 125-145k
MVP -165-195k
hall of famer - Unknown
all-time great – Unknown