Most efficient price for my gig?

[guidogavazza]

Hi ^^ im new here, I created a recording-tracks with my bandoneon and i already finish ten orders the past year, i change the price many times to test wich is the most efficient rank-price, but im looking other opinions, now i configurate to sell -40 sec of bandoneon track - 25$ . I created this price averaging other similar gigs. Wich price you think is more convenient ?
Cheers and thanks 😃

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guidogavazza : I will record bandoneon accordion for your music project for...

For only $25, guidogavazza will record bandoneon accordion for your music project. | I will record bandoneon music part for your project in mi home studio in great audio quality. I have +15 years of experience as music | On Fiverr