in UK , budget medium , Threat level highly paranoid...
1.) What are you looking for? (Safe, lock cylinder, padlock, secondary lock like a dead-latch, deadlock etc.)
2.a) If you know for sure what is the general type you should mention that too. (Like when you look for lock cylinders: Euro profile, Scandinavian oval cylinder, Swiss type round cylinder, US mortice, US Key-in-knob etc.)
2.b) What part of the world are you located in? (So people can give you locally relevant answers
3.) What is your budget?
4.a) What is the threat level? (Quiet home in small quiet town, flat in a big city's bad neighbourhood, small grocery at the corner or your secret underground vault for diamonds and Rubens and Degas and Monet paintings

4.b) What level of lock are you looking for? Middle class? Upper middle class? Premium category? Or top of the notch?*
5.) Are there any special requirements? (Like it needs to be dirt resistant because you live in a sandy desert, or on the contrary it goes into a lighthouse so has to withstand lots of salty water? Or with safes: does it have to be portable, does it have to be fireproof? Padlocks: indoors, outdoors? How about water & dirt?)
6.) Generally try to provide all the relevant informations but in a brief, succinct way.
