How much for a Joannes Franciscus Pressenda violin?

Joannes Franciscus Pressendas instruments are rare and vary greatly in price depending on the instrument and its provenance. His work in the 1840s when he came into his own is particularly prized.

Here are a few examples of recent sale prices:

* At Tarisio Auctions, a 1780 Pressenda violin sold for $20,700

* At Bromptons a c.1845 violin sold for £32,000 ($38,400)

* A 1845 Pressenda violin is currently for sale at Emil Heintz Violin Shop for € 70,000 ($74,000)