FortiGate 60F (New Open Box Licensed) vs. 301E (Used, Unlicensed)

[fgrep2seed]

hello,

A modern, fully-licensed, entry-level firewall and an older, powerful, but unsupported enterprise firewall. FortiGate 60F (New Open Box Licensed) vs. 301E (Used, Unlicensed) as shown below:

• Fortinet FG-60F FortiGate 60F Firewall Security Appliance FG-60G-BDL-950-36 
• used unlicesbed Fortinet Fortigate 301E NGFW Firewall Network Security SFP FortiOS

Which should  i purchase and what the cheapest cost to license the 301E?

Also, can I manually update the 301E without / bypassing FORTINET server ?

During login dol i need to access the FORTINET server first before accessing the unit ?

Thanks, David