[@Lucius Cypher]

Horses and other livestock animals are extremely valuable at this time; a Draft Horse would be the best you could manage to find for sale in the stable, and the stablemaster is haggard and[b] starts his pricing at 100 gold per draft horse.[/b] He remarks that all the warhorses and riding horses he had available were bought by the Princess, to keep the Knights of the Realm equipped. Each knight needs three horses if they have a squire, and potentially more if they have a chariot, etc., so all he has left are farm horses.

The local music shop, [i]The Winds of the Dale[/i], would have a Drum available for 15 Silver [1 gold, 5 silver].

A proper Healer's kit, fully stocked and ready for use, from the Apothecary would cost 25 gold; supplies are short. Jerald is doing his best.

Travelling Supplies is fairly vague, but if you mean things like Rope and Rations then...

Rope will cost you 5 silver for 50 feet of standard rope, but 10 gold or more for anything special like 50 feet of Silk. 10 feet of Chain will run you 30 gold; metal is particularly valuable in Aesithas.

Rations, due to the food drought and famine plaguing the wider landscape, cost substantially more than one would typically expect in the historically fertile farmlands of the Dale; where ordinarily food rations such as this would cost mere coppers, they are now 1 Gold Apiece. Thankfully tavern food and raw goods aren't inflated to this level, but the adventure-ready rations are pricey.

in that Vein, the local smith doesn't keep any armor in stock. He could produce it but warns it would take time and be expensive. A breastplate would run you 100 Gold of time and metal. Half plate would take 250 gold. They would take multiple weeks if not months to prepare, respectively. The Castle Smith has them in stock, but they are Master Crafted and intended to stock the Royal Armory. He can part with them for 300 Gold and 500 Gold Respectively.

...In short, most things are roughly doubled- but a lot of things are much cheaper than typical D&D as well due to the adjusted/stunted economy of the realm.