Can you still buy an arcade machine for playing Pac Man?

Yes, you can still buy arcade consoles online. They range from $200 to several thousand, depending on size, colour and so on. Look at The Pinball Company, online. They offer free delivery - useful for something that size - and the one costing around $3000 has 32 games.

If you've got a large den or games room, it would be fun to have something that colourful to keep people amused. Perhaps put them on it if they have anger management problems: it'll keep them too occupied to rant and rave!