I personally love Gallardos. It's a 10 year old car that looks cutting edge and brand new today.
That being said, without knowing Gallardos, the fact that it is 10 years old and has 5400 miles tells me it has NOT been driven. AT ALL. Is that a bad thing for these cars?
Also, $105K seems awfully high for an '04 Gallardo. Thought they were in the $85ish range. But then again, low miles.
Check with Moto44 on the forum. Long time multiple Lotus owner who became the head of service at FVMC. Tons of experience dealing with Lambos and their service realities. Also, check with TJ (TWaszak here on the forum). He's now at Gator, but was the Lotus guru at FVMC. His counterpart Billy is know is to Lambo what TJ is to Lotus. Very well respected dude in Lambo circles and can tell you everything you need about maintenance, reliability, etc.