The Timex Sinclair 1000, the slightly modified US version of the Sinclair ZX81, was released in 1982 and did pretty well mainly due to its incredibly sensible launch price. The fact that it came with two whole kilobytes of memory must have helped quite a bit too, as must have done a rich library of software and peripherals.
To own such a micro, you could bid on this Timex Sinclair 1000 auction on eBay. The computer comes with manuals, books, a few tapes and the Timex Personal Printer. It hasn't been tested, but -aesthetically- looks absolutely fine.
Seller ships worldwide.