Possibly $150, think it could really vary a lot if it went to auction. Usual for other MGRs would usually be around $80-$100 but she's more wanted/rare? (I own several MGRs mib). Though I've been staying away from MOC/MIB collecting for a little bit I expect it's probably still the same.
I feel like I saw one sell for $175 before but I can't remember for sure.