Buying items through Oleg and Svetlana

Mundane Items (things that cost less than 10gp or that make sense to have available for explorers, merchants and trappers)  

At any moment, Oleg has approximately 500gp of equipment available for you. This is mundane equipment: armor, weapons, adventuring gear, some alchemical items (sunrods, for example)... In general, he won't have more than 50gp invested in the same type of item.  
The available equipment is replenished once a week, on the first day of the week.

Special and magic items

For special and magic items you will have to order them and he'll be able to provide them in 5-10 days, depending on whether he finds someone that sells them in Restov or needs to find a contact in New Stetven, which is farther away... Pitax is a den of thieves and bandits, not suitable for honest commerce (this is what Oleg tells you)... As for the exact number of days, we'll decide it using a Luck check (done by the person for which the item is intended). The time will be 5 days + 1 day for each point of difference between your luck test and 11; maximum number of days will be 10.

- A 20+ (or natural 20) in the Luck check means the object is available immediately with a 20% discount.

- A 1- (or natural 1) in the Luck check means the object is not available at that moment. You can retry the check 10 days later, but the item will cost an extra 20%.

Special treatment from Oleg

Thanks to your help with the bandits, Oleg will provide boarding at his lodge at half price, he will also waive his commission for bringing special items, i.e., he'll assume the risk of the item(s) being stolen. On top of that, and also thanks to the moon radishes you gave Svetlana, Oleg offers you a discount of 50gp per adventurer for 1 item each (could be the first item you buy).

Alchemical Items (potions, oils, poisons, and similar)

Finally, he also tells you that he buys most alchemical items from a hermit called Bokken, who has a hut 15 miles east of Oleg's Trading Post. Bokken also brews potions, so it could be well worth the visit... He also agrees to trade with him in your behalf if you prefer it. Therefore, alchemical items and potions will take 1-5 days to arrive (same Luck check as with other magic items, so 1 day+difference of Luck test to reach 11).

- A 20+ (or natural 20) in the Luck check means the object is available immediately with a 20% discount.

- A 1- (or natural 1) in the Luck check means the object is not available at that moment due to lack of components. You can retry the check 5 days later, but the item will cost an extra 20%.

Luck Check

This is a Charisma check, with other modifiers depending on the circumstances.