The historical value is that pretty much every store in the US that took credit cards had one of those Verifone things in the late 80s/early-to-mid 90s. Most people here who are old enough had experience with them; I bought my first TV and Super NES by swiping a card on one at a Best Buy. Smaller businesses that haven't yet converted to iPhone/Android based solutions still use similar terminals, but with less-sexy LCD displays now.
Oh, and that's the other reason to emulate this thing: VFD is the bomb.