Looks good, and congrats on the sales. Looks like you will get a lot of repeat customers with that sled design. The price is reasonable from a customer perspective, as for yourself it depends how much time and effort you are spending on them and the cost of materials, you need to make a bit of profit from them no point just scraping through. After giving my kids teachers a personalised keyring, it has sparked a lot of interest from other teachers wanting one and to also order some for friends and family .. I was thinking around $10 - $15, but they seem willing enough to pay $20 each for them.
In the end, if you are happy with the prices you have set, then keep them at that price, raising the prices could affect that 'impulse' buy.