Man that sucks. My car was broken into not long ago, fortunately they didnt get the car. Sounds like it is someone in your street who knows you take the fuses out.
FYI you only need to take the fuses out for about 2-3min to demobilize the car and what not, or its the battery terminal, one or the other, so a pro bringing fuses sounds suss to me. I think its someone you know or who lives near you.
Dude that sucks, sounds like a organised crime hit though if they wont offer up info about the car for that cash.
Think on the bright side, the scum bag that they caught gets to enjoy the showers for how long?