Not having to do mods is great, but you SHOULD DEFINITELY get your watch serviced at some point. This is not a "mod" but a general maintenance point. Whenever we talk about "best out of box" reps here, we speak about them purely in the phyical appearance aspect. Mechanics and movements are always better to be serviced, especially chrono graph movements
In regards to your other question, yes, it's common policy to pay before you get any pics. QC pics are a bit of legwork for many of the dealers, as they have to go to the factory, pic out a watch, take pics of it etc. Mary from puretime sometimes doesn't ask for payment before pics, but i guess it depends on the dealer.