This is the 17573rd most frequent Russian word.
труднодоступной
"Hard-to-reach" or "inaccessible."
Here, 'труднодоступной' qualifies 'редкости' to specify that the rarity of the items implies they are difficult to acquire.
Магазин продавал труднодоступной редкости товары.
The store sold goods of hard-to-access rarity.
In this example, 'труднодоступной' describes the area in the mountains, highlighting the challenging nature of reaching that specific location.
Экспедиция направилась в труднодоступной район гор.
The expedition headed to a hard-to-reach mountain area.
The word 'труднодоступной' is used to describe the village, indicating that access to it is difficult, conveying an attribute of the location.