What to watch for in the Inventory Vehicles?

Went to Tesla store to check out MY and the advisor said there is a bunch of available inventory for the spec we want. Came back home and placed the order and was assigned a VIN within minutes but I was told I could go in and pick which one I want and get the VIN updated. What should I be looking for other than general Tesla checklists? I think it might be better for us to transfer FSD before March 31st that way but want to make sure inventory doesn’t mean those are rejects lol.