N.a.d S
Google
As local as it gets! From reviews, it says that the market comes alive between 11pm - 6am. I think we were the only tourists at 3am that day. Insane experience.
TBH, I don't think you need a local guide, we survived with the Google Translate & calculator app on our phone and the sellers were generally friendly and helpful, of course there were some rude ones but that won't spoil the experience. Most were selling wholesale but if you ask nicely, they would give in to sell 1-2kg at retail prices. I noticed the ones near the main gate entrance are likely to sell retail than the ones at the back.
Basically all types of seasonal fruit from Vietnam, they do have imported fruits though. Do go here for the Lychees, Dragon fruit, Mangos, Durians, Avocados and more!