A box like this, showing up at your apartment every month, for a year. How many times have you passed Barneys or Bergdorf Goodman, and were unable to even afford a mascara? I mean Cover Girl is nice but there’s a time in every girl’s life when she wants to class things up a little bit. That’s why the Broketown ladies were happy to see that Birchbox, which is like Barkbox for human females, is on sale at Gilt City. Birchbox members get a box of trial-size beauty products every month, including mascara, nail polish…