This plugin handles managing shops in the game giving you more shop features.
Adjusting Shop sell prices
Shops with item stock
restocking item shops
Adjusting randomized item prices
Install the script with...
If you can make one heap of all your winnings
And risk it on one turn of pitch-and-toss,
And lose, and start again at your beginnings
And never breathe a word about your loss,
Yours is the Earth and everything that's in it,
And—which is more—you'll be a Man, my son!