It just makes me wonder if the hubcaps do look diserable, why go through the hassle of stealing a whole car? why not simply get them instead.
But then, investing money in hubcaps isn't that great anyway. Firstly, they never look really good, as you either still see the steel wheel through it, or they cover the whole wheel which looks stupid. Secondly, those bastards tend to get broken if you hit a curb while parallel parking. Thirdly, they do tend to come off after a while, preferably somewhere where you don't instantly notice.
If I were you, I'd rather save for reasonable alloys, as they actually benefit on both how the car drives (allbeit only marginally) and how it looks (unless you chose ridiculously large wheels with ridiculously narrow tyres...)