The costs of a restoration are purely labour and material costs, whereby the degree of difficulty is also decisive in the case of a rarity. Rarity is defined as an objectively perceived rarity.
Most historical furniture is truly unique, even if not necessarily unique in terms of historical valuation. Furniture that was made by craftsmen from the time of industrialisation onwards, i.e. from the Wilhelminian period onwards, is usually no longer a rarity, as it was already made by the dozen. If only very rare individual pieces of such furniture are still on the market, these can also be rarities.
If the furniture in question is a rarity, special measures must be taken. This usually leads to a higher expenditure of time, which in turn leads to higher costs. Normally, the hourly rate is up to 50% higher than for a normal restoration. Should I charge for a restoration according to the rarity factor, this will be discussed in advance. Especially in the case of rarities, there is often a higher cost of materials, as custom-made items are necessary or partners have to be called in.