Like so many things with retro-computing it only takes money
Ian Mavrik (http://ianmav.customer.netspace.net.au/trs80/
) would be pleased to sell you one. I have been lucky to collect 2 Model 4's, a Model 3 and a Model 100 over the last 15 years.... most before collecting became popular.
Seriously though.... yes they are nice machines, particularly the Model 4 but not very common in New Zealand.
While my Model 3 and one Model 4 are stock configuration machines, the one with the failed CPU is definitely not.
I got it through Trade and Exchange in the late 90's and was staggered when I went over to pick it up because it was the machine that Bill Porter (the owner of Porterfield Computers... the Radio Shack agents) used for all his software development and I think subsequently sold to Basic Payrolls in Newmarket who did a lot of bureau payroll processing using TRS-80's in the late 80's. I worked for Porterfield as a holiday job in 1985/86 so had used the machine regularly.
It was very distinctive because the internal drives had been replaced with 2 x 80 track (Mitsubishi) and 2 x 40 track (Tandon TM-50). I think the machine was a US domestic model, imported before the 240v model was available and modified for NZ so the power supplies are after market Astec units and there are a number of mods to the main board and floppy controller.
I am refurbishing it at the moment and have replaced the floppy drives with two internal 3.5" 720kb units in the bottom bay which makes software transfer from a PC a bit easier. I will probably connect one of the TM-50's externally so I can easily write disks for the other machines. A full height hard drive frame in the top bay with an internal "SD Card" and interface board the emulates a Radio Shack hard drive.