Cloud9 defeated G2 this match where this weapon was dropped in the quarterfinals on Friday, January 26, 2018. 

This is a Souvenir, Factory New, UMP-45 | Blaze with 4 unscratched golden stickers (Gold Cloud9 Stewie2k, Gold Team G2, Gold Team C9, Gold ELEAGUE Boston 2018).

I expect this weapon to be worth more after Cloud9 hopefully defeats FaZe tomorrow in the final of the Boston 2018 ELEAGUE Major. So don't bother low-balling. It's pretty hard/impossible to find this sticker combo currently.