Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:3437al-Rabīʿ b. Nāfiʿ Abū Tawbah > ʿUbaydullāh / Ibn ʿAmr al-Raqqī > Ayyūb > Ibn Sīrīn > Abū Hurayrah

Do not go our to meet what is being brought (to market for sale). If anyone does so and buys some of it, the owner of merchandise has a choice (of canceling the deal) when it comes to the market. Abu 'Ali said: I heard Abu Dawud say: Sufyan said: none of you must buy in opposition to one another ; that is he says: I have a better one for ten (dirhams).  

أبو داود:٣٤٣٧حَدَّثَنَا الرَّبِيعُ بْنُ نَافِعٍ أَبُو تَوْبَةَ حَدَّثَنَا عُبَيْدُ اللَّهِ يَعْنِي ابْنَ عَمْرٍو الرَّقِّيَّ عَنْ أَيُّوبَ عَنِ ابْنِ سِيرِينَ عَنْ أَبِي هُرَيْرَةَ

أَنَّ النَّبِيَّ ﷺ نَهَى عَنْ تَلَقِّي الْجَلَبِ فَإِنْ تَلَقَّاهُ مُتَلَقٍّ مُشْتَرٍ فَاشْتَرَاهُ فَصَاحِبُ السِّلْعَةِ بِالْخِيَارِ إِذَا وَرَدَتِ السُّوقَ قَالَ أَبُو عَلِيٍّ سَمِعْتُ أَبَا دَاوُدَ يَقُولُ قَالَ سُفْيَانُ لاَ يَبِعْ بَعْضُكُمْ عَلَى بَيْعِ بَعْضٍ أَنْ يَقُولَ إِنَّ عِنْدِي خَيْرًا مِنْهُ بِعَشْرَةٍ