The Traveling Cart is a shop that appears south of The Farm in Cindersap Forest on Fridays and Sundays, closing at 8pm. It also appears each day of the Night Market (Winter 15-17). Stock changes each day the Traveling Merchant appears. The merchant will sell a selection of ten random items in limited quantities (1 or 5 of each) as "standard stock", plus one piece of furniture at any one time. There may be an additional "special stock" item for sale as well.
Traveling Cart prices may vary from visit to visit. Prices are usually quite inflated, but every once in a while an item can be sold for less than its normal price. Do note that items are sometimes found for sale outside their normal seasons, which can be helpful for completing bundles.
The cart is pulled by a pig wearing a fez and spectacles. Interacting with the pig will result in it oinking at the character. Holding down the right mouse button will cause the pig to repeatedly oink, resembling a song. During the Night Market, the pig floats behind the cart in an inner tube.
Multiplayer only: 100% chance to appear until purchased. Singleplayer: Does not appear.
Standard Stock
Items not shown are not sold at the Traveling Cart. Items sold at the Traveling Cart are always of normal quality, never silver, gold, or iridium quality.
Each piece of Furniture shown below has an equal chance of appearing in the Traveling Cart's stock (1/146 or 0.68%). The price for each will be between data-sort-value="furniture"250–2,500g.
Furniture not shown is not sold at the Traveling Cart.
If the Guarantee Year 1 Completable advanced option was enabled when creating the save, the traveling cart is guaranteed to sell Red Cabbage Seeds at least once in the first year between spring 7 in the Forest (cart's second visit) and winter 16 at the Night Market (cart's 30th visit). The day is selected at random when the save is created. The guarantee only applies on that single day, even if the player doesn't check the cart or buy the seeds on that day.[1]
For the Android and iOS version of the game, after buying something from the cart and closing and reopening the shop menu, the item can be bought again. This can be repeated indefinitely.
References
↑The game code initializes Game1.netWorldState.Value.VisitsUntilY1Guarantee in Game1::loadForNewDay, then decrements it for each traveling cart visit. Red Cabbage Seeds are guaranteed when the value reaches zero, after which it's decremented to -1 and no longer applies.