Can I sell the handwritten heart sutra in lower case?

it's best not to sell, because the Buddha statues and Buddhist scriptures can't be sold, and you don't want to earn money in Buddhism, which is easy to cause and effect. Reference:

"Scriptures, Buddha statues, Buddhist CDs, prayer wheels, Darani quilts, Buddhist chanting machines and other magic weapons are ideal for free, and it is better to give them away with postage. The second is to recover the cost without making money, and the third is to recover the cost a little more to maintain the operation at work. No matter what method is used to circulate, the psychological method is the most important. The premise is that the goods cannot be sold for profit, and then the money is used for the purpose of subsistence. Send it as soon as it's printed, and print it after it's finished. It's the best way not to involve money transactions. " ~ Master Chang Guanyin?

"The Buddha declared that it is forbidden to sell the Buddhist scriptures of Buddha statues as commodities. This supreme decree must not be violated. Many people think that even if I sell it, it doesn't matter. Isn't it a merit that I don't take any profits, or use the profits I earn for printing scriptures, releasing them and offering them to monks? Yes! Of course, there are merits, but there are also faults in selling this action. Let's not talk about profit or not. As soon as you do this selling action, a commercial chain will be formed. If you don't make money, you will succeed. ?" ~ Master Chang Guanyin