While I've been a VG-collector for consoletitles a very long time I've always wanted an arcade. Thinking this would be the best place ever to ask

http://www.blocket.se/ystad/Arkadspel__ ... =23_14&w=1
^Currently I'm in talks with the seller about this machine. Going to check it out on Sunday. Saw it by accident and it's very close to me (rare for me that anything's close) so therefore the hasty questions.
Questions I mainly have:
1. What should I look for/be wary of (screen/speakers/controls/technical/whatnot)? Seller says:
"Jag har ingen dokumentation av den enda reparation jag varit involverad i men då handlade det enbart om att stärka upp ett par lödningar och byta en säkring (till den del som förser högtalarna och myntinkastet med ström). Vid monteringen efteråt så kletades även på ny värmeledande pasta på de ytor i Hantarex-aggregatet som behöver det."
Translated very roughly: "I have no documentation about the only repair I've been involved with but that time it was only about strengthening of a couple of solderings/leadenings (to the part that provides the speakers and the coinslot with power). At the assembly afterwards the surfaces in the "Hantarex aggregate" that needed it had heatleading paste sticked onto them.
It has a reversable screen (I'm assuming this means it works for sidescrollers as well?)
2. Is the price OK? 4000SEK is roughly 600$/450euro/385 GBP according to google. -500 SEK if Raiden 2 doesn't come along but that's not relevant (I think?). Would be selling a couple of consoles to finance it so not too proud to haggle here. What's fair if it's not already? It's about
3. How hard are these machines to repair/exchange games/parts in/do anything technical with? Like said I have no prior technical experience but...one can always learn if it's not superdifficult?
4. Is it possible to adjust volume etc in an easy way or does that involve going into the machine as well? In an old apartment so would want to be careful with the neighbours.
5. Is it possible to "pull the plug" over nights or does that require a whole lot of settinginputs over again afterwards again? I'm guessing no if it's all done inside?
6. Follow-up on the above question...are these firehazards/do they overheat a lot or anything like that? Can't help but notice a fireextinguisher right next to it.
7. Anything I have forgotten/should think about? Compability or anything like that? Again I have absolutely no clue. Please be nice and help and don't verbally facepalm me

Additional pics he sent:




More of what it says in description:
"Allt från myntinkast till joysticks och skärm (25') fungerar perfekt. Det är ett robust ståkabinett med vridbar skärm.
Kabinettets kraftaggregat är nygenomgånget på så sätt att lödningar förstärkts och en viktig säkring har bytts mot en ny."
Everything from coinslot to joysticks and screen (25') works perfectly. It's a robust steelcabinet with reversable/"turnable" screen. The cabinets poweraggregate is newly gone over and solderings have been strengthened and an important plug has been exchanged for a new one. (Basically the same already translated).
"Enheten är ca 176 cm hög, 90 cm djup och 65 cm bred "
The unit is about 176 cm/69 inches high, 90 cm/35 inches deep and 65 cm/25 wide.
Massive thank you in advance for any help at all. Can translate anything else if you need to provide proper help but the english will still be crap. Thank you again
