Boom! Studios· 2018–2022 series · Cover date Jul 2021
Fair market value
Grade
CGC slab
Raw
9.8 NM/M
$480
$408–$552
$210
$179–$242
9.6 NM+
$374
$318–$431
$168
$143–$193
9.4 NM
$292
$248–$336
$134
$114–$155
9.2 NM-
$228
$194–$262
$108
$91.39–$124
9.0 VF/NM
$178
$151–$204
$86.02
$73.12–$98.92
8.5 VF+
$139
$118–$159
$68.81
$58.49–$79.13
8.0 VF
$108
$91.89–$124
$55.05
$46.79–$63.31
7.0 FN/VF
$84.31
$71.66–$96.96
$44.04
$37.43–$50.65
6.0 FN
$65.77
$55.90–$75.64
$35.23
$29.95–$40.51
5.0 VG/FN
$51.30
$43.61–$58.99
$28.19
$23.96–$32.42
4.0 VG
$40.01
$34.01–$46.01
$22.55
$19.17–$25.93
2.0 GD
$31.21
$26.53–$35.89
$18.04
$15.33–$20.75
Raw, ungraded
—
$65.00
$55.25–$74.75
Value history
Show history as a table
grailworth's fair market value: what a copy at each grade is worth today, from this issue's market
and how value moves with grade across every comic we track. Bold: our firmest values. *Rough: a looser estimate.
+$: worth grading, a raw copy at that grade gains this much slabbed by CGC, after the fee and shipping.
Pick a grade for its value history and the most to pay for a raw copy you'd send to CGC.
What's it worth?
See fair market value at every grade, raw and CGC, with value history and the grading break-even.
Firefly #31 (2018) is issue #31 of Boom! Studios's Firefly (2018–2022), with a cover date of July 2021. grailworth values it from 4 recorded sales, most recently on Jul 4, 2026, and from how comics like it move in value from grade to grade.
