There are two types of insurances - Replacement and market value. Normal home insurances do not usually show any interest until you make a claim. You can simply place them under "contents" but you need to provide recipients or have then valued. You can go to a broker and they will find a suitable insurance company that will cover the individual games at market or replacement value. I've yet to see an insurance company pay out a claim using eBay as a guide
Revenge from mars cab 10 - $3500
Star wars ep1 cab 9 - $3300
Theatre of magic cab 9.7 - $5000 to $5500
Terminator 2 cab 8.5 - $3500 to $4000
Funhouse cab 8 - $3200 to $3800
Twilight zone cab 10 - $6000 to $6500
Space invaders cab 7.5 - $3000 to $3500
Embryon cab 7.5 - $3500 to $4000 (Very hard to replace)
Now please keep this discussion "on topic". The OP is interested in pricing on HIS games. There are other topics to discuss dealer pricing etc.