I booked a one day tour to the Mekong Delta through a travel agency. The pamphlet quoted 220000 VND but the organizers told me that with charges, the price will be 300000 VND. I said to myself: That is less than 15 USD and did not argue.
They picked me up at my hotel at 8 am and after about 2 hours in an ac bus, reached a village called My Tho. We stopped at a coffee shop for about 15 minutes midway between HCMC and My Tho. Then we boarded a big boat and visited a coconut candy factory, had honey tea and candies, had fruits and tea while enjoying local folk songs. We also had a basic lunch (included in the 300000 VND) and watched a show on another island.
The most exciting part was when we boarded small rowing boats in groups of 4 and went inside rice paddies. The guide spoke good English and was very friendly and funny.
After the return trip, was dropped at Pham Ngu Lao. That was OK for me as my hotel was within walking distance.
In short, a very pleasant day with loads of fun at a very affordable price.