by purchasing them?

recalling is free already and if you buy goods you can't know if those are yours or not unless price has reached price you put your goods on sale and only your goods are on market at that price (possible but basically impossible).

But normal recalling costs 3 turns, which isn't free for a techer. So a demo does have an advantage there.

However, there would be very few situations where you would want to buy your own goods from the market as a Demo.

Yes, you can buy your own goods on the market for free as a Demo, if they are on sale and happen to be at the front of all the goods at that pricing. Note you do need to have the cash upfront even though the amount of cash on hand doesn't change.

chance that gets to buy own goods is very minimal (occasionally my non-techers have bought my techers techs but that has happened cause tech market has been thin so my farmers have pumped price up and reached price my techers sold techs, no idea if my techers have ever bought my farmers bushels).

marshall running multies?

You may legally run up to 16 countries on the FFA server.

yah, but u might wake up and find half of them dead, as I did this morning.

last time that happened was due war.

An alternative is to buy the $36 bushels until your $37 ones show up

that is if has put bushels on sale at 37, totally different thing is to buy all 36 bushels if there are several hundred million bushels at 36 (if there are 300m bushels on market that'd require ~5 buys and selling if had ~2b bucks in hand in the beginning, 1b bushels or more would require quite a much time).