when you say nice domain...
There are hundreds of extensions. Therefore what makes you think .pw is a good one to choose?
TradeBitcoin.com = good domain
TradeBitcoin.pw = reg. fee
Nothing wrong with .pw domains. Two character non country related domains are rare.
I have declined an $300 offer for one of my .pw domains.
So the right domain is definitely worth more than reg fee
Thanks for the justification 1referee, also, .pw stands for " professional web"
So overall, this domain is a nice one and is definitely rare