Hi all, after some research, I think the best option is to ship using DHL Paket International service across the border in Germany. A box with max weight of 31.5kg (max dimension 120cm x 60cm x 60cm) rate is EUR124.99. It's a good deal
. Swiss Post in Switzerland offers the same service at CHF204 for same weight.
A relocation company suggested the option of using the service of Intrapass at Zurich airport. However it is only possible if one has friends to help carry all the extra luggage /boxes. I will not be able to handle the extra boxes other than my check-in luggage(s) from Basel to Zurich