There is no minimum order or minimum turnover with us. With this we would like to enable you to order samples or to buy only single models for testing or as replacement of defective goods etc.. However, we reserve the right to close customer accounts that do not generate enough sales. You are welcome to return up to 10 individual products. Please enclose a copy of the invoice with your return. You will find this in your "Account". You have to pay the return shipping costs; however, these will be charged by us with the rate in Germany of 4.90 euros plus VAT - from a repeat order of 250 euros. If you have further questions, please contact our support team.