I'd always keep a radio, mainly because I couldn't imagine not. But also because I would never sell a radio capable of transmitting to a non-ham or someone who was not at least studying for their ticket.
Might leave the NMO mount but Larsen makes little 3/4" plastic plugs you can use to fill the hole left if you take it out. If someone asks about it, it's for a cell phone antenna.
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"They say the test of literary power is whether a man can write an inscription. I say, 'Can he name a kitten?'" -- Samuel Butler