On SAAB's website it says "Developed in partnership with Boeing, our GLSDB . . . " & shows a video of a firing at Andøya test range. That was in September 2019 (see link below).
The first test launch was in February 2015. And it used the same rocket motor, but not the whole missile - "Saab and Boeing signed a teaming agreement in August 2014 to develop the GLSDB by integrating Boeing’s GBU-39B SDB I bomb and M26 rocket motor of the M270A"
"Saab and Boeing conducted a series of live-fire tests of the GLSDB, using the rocket motor provided by Nammo in Vidsel, Sweden, in February 2015 "
2019 -
https://militaryembedded.com/radar-...llowing-third-test-launch-say-saab-and-boeing
Given that they've made a few, fired them, & it uses mostly OTS components (it's a in-production warhead with built-in guidance fitted to an in-production unguided rocket), I think SAAB & Boeing should have an idea of the costs, even if not an exact price.