Holiday lottery

I just came back from my holidays, sent lots of cards, don't know how many yet. I need to count first. 
And now I have another lottery for you, guys. Who can guess how many cards I sent? I will send a card to the winner in July :)

1. Guess how many cards I sent on my holidays, give a number, i.e. 10, 17, etc.
2. 1 guess per person
3. Leave your e-mail so I can contact you later

On my blog everybody can comment, choose 'COMMENT AS ANONYMOUS' in the comment box. The lottery closes on July 1st (12:00). Randomizer.org will help me draw the winner. 

Good luck!

Some hints for you, photos of me popping the cards into mailboxes.

Saint Lucia

Sint Maarten

Saint Kitts

Puerto Rico

United States Virgin Islands