I've decided on buying the "Merkur 38C Barber Pole" as my starting razor. I just can't decide on a finish to use:

Nickel - Merkur 'Barber Pole' Safety Razor (one razor blade included): Amazon.co.uk: Health & Beauty
Chrome - Merkur 'Barber Pole' Heavy Duty Double Edge Safety Razor: Amazon.co.uk: Health & Beauty
Aluminium matt - Merkur 38C Barber Pole DE Safety Razor Aluminium Matt Finish: Amazon.co.uk: Health & Beauty

Also, what would you expect to pay for a single DE blade ?
So I can scale it up when I buy differing amounts etc.