This module adapts Commerce Paypal functionality for Commerce Marketplace.
It was developed during Drupal Developer Days Montpellier 2015 as an example of a Drupal Commerce payment method adaptation for Commerce Marketplace.
Details
For the moment this module supports only Paypal WPS (Website Payments Standard).
It also provides very initial, very rough and not yet finished support for parallel and chained payments using PayPal Adaptive Payments.