I read "Places to get alarms," but...

…It doesn’t seem to provide much info on where to go for new/unused equipment. Simple Google searching shows that I can get new stuff from places like Newegg, Zoro, BSAi, and other places… but just wondering if anyone has any specific reccomendations/“stay away from” warnings for distributors other than Home Security Store (which shows almost everything as “Out of stock”)?