Parts and Inventory - What should be carried? Where do you source?

"That kind of depends on what kind of business you are getting in.

My staples are:

500GB & 1 TB SSHDs & a couple of 2TB 2.5""

1 & 2 TB SSHD in 3.5""

256 & 500 GB SSD drives

RAM for iMacs & MacBook Pros 2008-2012

13"" & 15' 2012 Hard drive/IR cables (5 of the 13"" , 3 of the 15"" each)

13"". 15"", and some 17"" MacBook Pro 2009-12 glass display replacements

13' & 15"" 2009-2012 LCDs

2.5"" & 3.5"" external hard drive enclosures

a wide assortment of MBP batteries (probably to many)

older wired & wireless keyboards and mice

OWC inline thermal sensors

21"" & 27"" iMac screen adhesive strips

keyboard skins for give aways

MacBook Pro feet (3 different types)

Several types of Mag-Safe Adapters

one or two each of the 2012 13"" & 15"" MacBook Pros - set up & with upgrades

anti-virus licences

all the digitizers and glass & batteries for all iPhone 6 & 7's

assortment of iPad batteries & glass

A1286 & A1278 mag-safe boards, clutch covers. keyboards, lower case screw sets

@kaykay this answer might be of interest to you, because you don't carry a lot of these things that I use the most. These are things I buy in lots.

Well that's what comes to me off the top of my head ."