I cannot guarantee that the save batteries still work in games that have them. These are 30+ years old now.
If a game doesn't work, I'll let you know (if it's damaged in shipping, I'll work with you).
If you wish to combine shipping, commit to buy the games and then send me an invoice request (or message me).
I can't do media mail, but I can combine shipping to whatever makes sense for the volume, distance, and weight.
It's better to request the invoice before paying because if I have to do a partial refund, paypal unfairly keeps a portion of the money from that.
If the amount of games requires a box that won't fit in my mail box, I'll drive it out to the nearest post office, but there might be a delay on that so just keep that in mind.