Some newly built communities do not have complete supporting facilities around them. Like the fruits, vegetables and food you mentioned, the prices of these commodities often depend on the supply of vendors.
Old communities generally have stable purchase channels and sales channels, so prices will be relatively stable.
The purchase and sales channels of new communities have just been established and will take some time to adjust to the market, so it is normal for prices to be high.
But now the price difference is not that big, because with the Internet, you can buy many things online.
If the price in the nearby market is high, you don’t have to buy in the nearby market. Over time, merchants with high prices will close down if they can’t sell.