How accommodating is Montblanc with the nib exchange of an unused fountain pen acquired on eBay, and what costs are to be reckoned with?

A nib exchange is basically possible; without proof of purchase from a boutique or from an authorised dealer, however, a service flat rate is charged, which depending on source lies at about €39-49. If the nib is not accepted by Montblanc as near-mint, a new nib can be required, whose costs can amount to up to half of the fountain-pen price (example value: about €190 on the 146). With a near-new piece including warranty booklet, an alternative is the direct exchange at the local stationery dealer for a model with the desired nib width, which is partly possible without bureaucracy and free of charge. The boutique mostly decides on the spot and additionally allows trying out various nibs.