The Prophet ﷺ forbade the selling of foodstuff before receiving it. I consider that all types of sellings should be done similarly.  

سَمِعْتُ ابْنَ عَبَّاسٍ ؓ يَقُولُ أَمَّا الَّذِي نَهَى عَنْهُ النَّبِيُّ ﷺ فَهْوَ الطَّعَامُ أَنْ يُبَاعَ حَتَّى يُقْبَضَ قَالَ ابْنُ عَبَّاسٍ وَلاَ أَحْسِبُ كُلَّ شَىْءٍ إِلاَّ مِثْلَهُ  

Messenger of Allah ﷺ said, "He who buys foodstuff should not sell it till he is satisfied with the measure with which he has bought it.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنِ ابْتَاعَ طَعَامًا فَلاَ يَبِيعُهُ حَتَّى يَسْتَوْفِيَهُ  

Some people used to buy foodstuff at the head of the market and used to sell it on the spot. Allah's Apostle forbade them to sell it till they brought it to (their) places.  

كَانُوا يَبْتَاعُونَ الطَّعَامَ فِي أَعْلَى السُّوقِ فَيَبِيعُونَهُ فِي مَكَانِهِمْ فَنَهَاهُمْ رَسُولُ اللَّهِ ﷺ أَنْ يَبِيعُوهُ فِي مَكَانِهِ حَتَّى يَنْقُلُوهُ