Problem selling shoutouts

Hello BHW!
i hope you are fine . i have an instagram account about models and lifestyle and i post just female models and girls . my posts get between 700 likes to 3000 likes accourding to the quality of photo . last month i thought that i need money because i spend much time building it so i have tried to sell shoutouts . i sent many private messages to many brands and models but no one sells even the fee is just 3$ . please i stocked and i do not know what step i can do . please share me…

Problem selling shoutouts