It may be worth your while to pay for a new one. If you buy a used one, and it has already been registered in someone else's name you may have problems accessing the free lifetime factory warranty repair and servicing. That warranty is perhaps the best reason to buy a Scotty and Scotty is amazing with the service they provide under that warranty.
I bought a new 2106 some years back at Trotac in Victoria. I did not need the mounting plate and swivel base as they were already on the boat, so they kept them to sell separately and credited me, which saved some bucks. I also have an acct. with them, which gives me a small discount. Sometimes various retailers put them on sale, so it could pay to consider a new one and shop around.