Before Buying - Do ask the following Questions:

Do You Have the Time?

Though the Miniature Pinscher is a small dog, they are very active and alert and require a lot of attention and interaction. 
Do not mistake the miniature pinscher for a handbag dog he will not sit still for long and though only requires 30 minutes of exercise per day they are an intelligent breed that may well become destructive when bored and left alone.

Can You Afford to Keep a Miniature Pinscher?

Before buying a miniature pinscher or any dog for that matter please consider past the retail price!  Have you thought about the following Essentials:
Vaccinations, Bed, Lead, Collar / Harness, Food, Dental Products, Flea / Worming Treatment & Insurance

And the non essentials:
Socialisation, Training, Treats, Toys,

Please also visit the Miniature Pinscher Health Page before Buying

For more advice and recommended breeders visit the miniature pinscher club sites.