WTB Shure SM7 (need help!)

I've never actually thought about this but after doing the research even with paying for shipping and VAT I could save about £100 on the price of a new SM7. Not bad at all...

i got my schecter hellraiser last year (the 08 model with the tw 81 pup) from america with a schecter case.

including shipping taxes and the declaration of its cost at about 100 quid lower than its value, it all came in legit at £450 ish!!!
 
What if I buy one, stuff it in an sm57 box or other mic box, would they know the difference? Declaring <$100 wouldn't be much would it?

Sounds like a good idea to me. You always could send a bill with it aswell. Let's say about $100 "used". How would they know.