Thanks teef and Peale for actually reading what I wrote. I do recognize that I have something unique and special and I want to respect that to the best of my abilities.
Dave, unfortunately, I don't have hundreds of dollars to buy a vector monitor along with the refurbishing which it will probably require. I am also uncertain of the condition of the PCBs. There's a lot of unknowns which could very quickly increase the cost for the sole benfit of being able to play Tempest. (Which is a great game, but there's a break even point on cost vs reward which would quickly be exceeded.)
Thus I will work with what I have:
1. Original control panel & controls in decent shape. Therefore I will limit myself to those games playable with those controls (Blasteroids btw requires 3 buttons). It's a decent list and it looks like paddle (270 wheel) games will work too.
2. Cabinet & sideart are servicable, though far from pristine. Cleaning (any suggestions on what do use?) is what this needs, maybe repainting (not the sideart) at some point in the future.
3. No marquee so I will replace it ($).
4. No XY monitor. Assuming no-one has one for sale dirt cheap I will put in the largest monitor I can afford ($). This also has the advantage of letting me play more games (which also increases the WAF).
5. PCBs exist but are in unknown condition and are useless without the XY monitor. So give them to another BYOACer who might be able to use them to get a Tempest working.
6. Put in a decent PC ($).
Now, for those of you who want to have a Tempest of your own, the following are/were on eBay :
Working Tempest, sold for US$1000
Working Tempest, 0 bids at US$700
Tempest PCBs, unknown condition, current bid $30
empty Tempest cab, no monitor, PCBs, controls, or marquee, 0 bids at US$10
working Tempest PCBs, no bids at GBP95
mostly working Tempest, current bid US$340