Is there any module that extends Odoo's price list handling by allowing percentage values to be set on the product?
By default it's only able to set fix prices on the product, when choosing Specific prices per customer segment, currency, etc.
If you choose Advanced pricing based on formulas (discounts, margins, rounding) it allows setting percentage values under Sales > Pricelists however the possibility to set any price lists on the product form view is gone.
Does anyone know of any module which combines both?
"If you choose Advanced pricing based on formulas (discounts, margins, rounding) it allows setting percentage values under Sales > Pricelists however the possibility to set any price lists on the product form view is gone."
Can you explain what exactly you mean? Please edit your question and be more specific.
Under Sales > Config > Settings:
http://imgur.com/I1CsZQY
If you then go to the Pricelists:
http://imgur.com/fSpVCNz
And pick e.g. Christmas:
http://imgur.com/t5zvh00
In that price list, under "Pricelist Items", let's say we pick the first iMac item with a min Quantity of 5:
http://imgur.com/Qdpu6xp
Here you can see it's possible to specify discounts based on percentage (additionally to fixed price or formula).
This is not possible if under Sale > Config > Settings you choose the 2nd option (Specific prices per customer segment, currency, etc.). With the 2nd option, you manage price lists on the product form view. However it's only possible to specify *fixed* price values (% is not supported, e.g. see http://imgur.com/5sMu9Fe. In the column "Price" you have to specify you price per unit.)
last linke is broken because of the period in the url: http://imgur.com/5sMu9Fe