stolen Trek 500 series

my bike was stolen from my house in central boulder sometime between late saturday night 1/18 and early tuesday morning 1/21. it's a purple trek 500 from the early '80s with yellow taped handlebars. it's got a cable lock coiled around the top bar. it's probably worth less than $100 but had a lot of sentimental value. if anyone sees or hears anything please let me know. i'd even be open to a cash reward no questions asked if i could get the thing back. thanks (unfortunately i don't have a picture to share)