No, listing your gear is completely free! InstruShare only gets paid when you do. When the Seeker pays for the reservation, we add a 10% admin fee to your weekly hire price. For example, if you charge $50 per week to rent out your guitar, we’ll add $5 from the rental. Again, we only make money when you make money. There's currently an unavoidable, but small, PayPal fee of 2.6%+30c which gets subtracted from your hire fee.