Used Tanks, What is the armor rating of a M1A2 Abrams? Options

[hyzmarca]

It is rare to see a Shadowrunner driving down the street in a tank for some reason. Arsenal doesn't even have any main battle tanks for some reason. Yet, there is a real civilian market for surplus tanks and it is very easy to purchase one.

http://www.armyjeeps.net/armor1.htm

All of these tanks are old, of course. The Chieftian is the most advanced MBT of the 60s and the 70s, but it is obsolete now. Its armor is unlikely to stand up to any modern anti-tank weapons, but it works very well against small arms and the anti-tank weapons of its generation. And you can apparently buy one on the internet for $45,000 (or could, both have been sold).

Demilitarized tanks shouldn't be terribly common, but they should be available in the civilian marketplace for anyone with the desire and a relatively modest sum of money compared to their initial cost. Thje M1A1 Abrams is of sufficient age to have been retired by 2070 and that means that they will be available on the civilian market for the cost of a new car. The guns would have been removed and replaced with non-functioning display pieces or simply have been rendered unfireable, but that can be remedied by a character with an weapons shop or with the appropriate contacts.

For some reason, Arsenal doesn't have any tanks, new or old. But I must ask the question of what would be a reasonable armor rating for a used MBT circa 1992?