I think you are WAY on the high side thinking $3500. It's a good game, but only a good game. It should be worth more than a SS version of the game being the more rare EM. But 800 of a "version" isn't like the Evel Knievel EM or Charlies Angels EM that fetch very high money. There were still 800 of these made . Honestly, if someone offers anything close to $2K for this game and you are really looking to sell it you should accept. A few years back I would have put this closer to $1K, but people today like to collect the more unique games and will pay more.
I always thought Asteroid Annie was the best system one, that's my opinion. But again, you know what Clint Eastwood said about opinions.