Are you sure you weren't targeted by someone that has seen your collection?
99.9% of thieves have no idea what kits are worth, let alone to pick and choose certain kits and models. Most are drug addicts looking for cash, jewelry and other things they can sell very fast for easy cash or trade for dope. Plastic models aren't a quick buck kind of thing. Pawn shops and meth dealers don't want toy kits.
It's just too odd that you'd get broken into by a random thief that was also well versed in plastic models.
kinda what I was eluding to.. it does sound pretty sketchy that some random crackhead that robbed you happens to have knowledge of plastic ?