You can make the payment by bank transfer or by the poste :

Nostalgeek.ch 
76, avenue Eugène-Lance 
1212 Grand-Lancy 

Compte postal : 12-85997-1 

Informations bancaires pour les payements online :

IBAN : CH40 0900 0000 1208 5997 1

Swiss Post - PostFinance
Nordring 8 
3030 Bern 
Suisse

SWIFT Code : POFICHBEXXX

Your order will be reserved during 7 days. After this deadline, without reception of your transfer, your order will be cancelled. The order will only be treated after reception of your payment on our account.