how do you make it so that people can't buy your items
i just want offers on it cause its worth more than max mesos

Have at least 1 meso in your Inventory. Put max mesos as the buy price.

works for store permits as well or only mushroom stores?
sorry new to ms

Only works for store permits. A store can hold max mesos so make sure 1 item is sold for at least 1 mesos before doing it.

ok ty and the max mesos is
2,147,483,647 ?

ya
if ur gonna use a mushie make sure to put 1 item for 1+ mesos, sell it, and only then put ur items for max mesos (and dont clear ur mesos!)
otherwise ppl will be able to buy ur item for max mesos

i have a store permit not mushroom store
& what if someone buys your max mesos item before 1mesos item is sold? >.>

if you have a store permit then it's not a problem. just make sure you have some mesos in your inventory, and the unsellable item is expensive enough that it would put you over max.