I agree with mhh, the Gallardo has generally proven to be pretty much fault free and the car does not require a high level of constant maintenace or service. Service costs do not seem high for a car of this calibre.
There have been some issues and adverse publicity regarding the e-gear, but these seem to have been pretty much sorted out in later versions of software. Even so, the e-gear can be a bit "clunky" in stop-start city traffic, and standing starts on steep hills can require some special "e-gear" driving techniques, but it really excells and excites once you get going. On the other hand, the manual versions have had some clutch issues, but new clutch upgrades seem to have sorted these problems also, and the pedal "box" is a bit cramped.
I think this is the main decision for any prospective Gallardo buyer. E-gear or manual. Both have their good points and not-so-good points, and this topic certainly always seems to attract a fair bit of emotion and division - and I'm not going there!
As an owner myself, the car has proven it's reliability to me, and I have absolutely no concerns that the car is "going to have to be in the shop regularly" due to problems. Hasn't happened.