you've definitely overcome the biggest hurdle, which of course, is to get the better half to buy-in on the venture
here's some possibly useless options...
a) an original 'A' perfect machine will be low probability of finding, and if so, very pricy. (exceptions do happen)
b) an original 'B/C' grade machine (not local - have to pay for shipping) is very common, overpriced, but there's variability in the price range, and folks can be talked down.
c) an original 'B/C' grade machine (local) may be less common, meaning you could be waiting a year for it to pop-up within driving distance (1-3 hours away?). This could be a lower price than (b), as you can call the person, meet in person, and probably lower price.
d) an original 'D/F' grade machine means a repair job that could cost (in the end) almost as much as a 'B/C' machine.
e) buy custom built 'A' perfect machine will be pricy, but the better-half will approve of its appearance, and you can count on it working & impressing you and friends as a visual work of art. this also is available to you as fast as you can buy/ship it.
f) build your own. this could take up to a year, a lots of folks end up shelving the project due to lack of personal time (between work, wife, kids, family, holidays, travel, vacation, sick-time, missing parts, price, space to store parts inside air-conditioning, etc...). But if done, what a satisfying accomplishments you & all will enjoy, and you'll eventually sell for hopefully as much as you paid
for me... i'm custom building an environmental discs of tron (edot). but haven't dropped that bombshell on my wife yet.