all good points for you in your search. not sure if this is your first exotic, or just first lamborghini. if the former, here are my 2 cents:
1. set your budget and try to find the best car under that budget number. for instance, it may make more sense to buy a lower mileage better spec for $195k than to accept a much less desirable car for $185k. this type of car is oftentimes not a forever thing--and you want to have something desirable to others someday, even though it is also critical to get what YOU like. i was unwilling to settle for a color i did not like or make compromises on things that were important to me. spending this kind of dough lends to some regret if you compromise too much or get something merely because it is the best deal.
2. i (and albert on this forum for sure) have done multiple cars from locations that are far less than convenient geographically. flying out to have a look and/or having the car shipped to you are small costs when it comes to cars like this. very different type of purchase process vs more mainstream cars. i bought both my lambos from respected lambo dealerships, which gave me additional comfort (rightly or wrongly).
3. as others have said, some of the fun is in the chase! be realistic what your budget gets you (or you will never get one--some just make lowball after lowball and have nothing to show for it), but do not be afraid to hunt for awhile.
there are counterpoints to each of these points, but this is the kind of stuff i would have devoured a few years ago, so giving you my thoughts here. lots of great people on this forum who can be very helpful!