Not sure I'd do that trade..... I'm not a Gottlieb fan overall but stargate is the best one and is far superior to secret service imo. If you do the trade tho ....stargate usually sells for 1800-2500 depending on condition and ss usually sells for 1000-1300 depending on condition. Gl

Yes, Stargate is the much better pin. Play Secret Service and see if you like it. Simple gets boring quicker.

1,000 on top of the secret service is fair imo.

I am no expert or anything but I would recommend that you sell your Stargate outright first. That way you are more likely to gain full value (one just sold for $2600 here on Pinside).
After you sell, then go after another pin of your choice.
mho

Agreed with what other folks are saying. All things being equal, somewhere around a grand difference. If the Secret Service is super nice and the Stargate is just okay, the gap lessens, etc. I actually like Secret Service, and the music choices are fun, but as others have said, it’s not a complex game....

If the games are in similar condition, I would trade Stargate for Secret Service plus $1500. Stargate is definitely the better game.

Stargate is easy to sell at $2,000+. Secret Service is tough to sell even at $1000. I would never do the trade because Secret Service is not a great game and will get boring quickly, but if you did, I would want at least $1250...and honestly probably more. If you don't want Stargate anymore, I would sell it outright and then go after a game, you'll be better off financially in the long run.

I have owned both and have actually owned Secret Service three different times. If condition of machines is basically the same and you want a "fair" trade for both of you I would say $1000 to $1500 plus Secret Service for a Stargate. The $500 spread is because of 3 things. First off how bad do each of you want to do the trade. Second is actual value difference of about $1250 (give or take a few dollars). And lastly condition - which can only truly be judged looking at both machines in person.

From the "long term investment" standpoint Stargate is likely the better machine to own. But if you are interested in a cheaper machine non pinball guess will enjoy Secret Service isn't bad. I just think Stargate will go up in value faster than Secret Service over the next few years based on demand.

Secret service gets boring after 30-40 plays.
It’s also tough to sell

Don't do it!

Secrect servic is a dud!

Just sell your stargate outright and go buy something else if you are done w SG.

Slowly back off..... slowly......NOW RUN!!!

Find a better early DE like Time Machine, Laser War, or Torpedo Alley.

As they say,
easy to buy hard to sell