Hi. I want to know this: If a PSD template author agrees to sell me rights to convert and sell the theme in other categories on Themeforest, will it be fine with Themeforest? By this I don’t mean to have any partnership with the original author. Simply put, I would pay an upfront payment and that would be it for him. Is this allowed?
Next, how much do you guys think would be a standard price range to buy such rights for one PSD theme, so that only I have the right to develop and sell it on any category (HTML+WP+Magento)? $800-$1000, or $1000-$1500, or $1500+?
Yes. As for the price, it depends, from $500(extended license) to $5000 or even more, depends on the quality of the theme.
First off you will want to get the agreement in writing so you have evidence.
In terms of cost – it depends on what platforms you plan to develop it for. I would expect any sensible PSD author to realise that and price it accordingly, weather it is a per platform buy out fee or a one off for all platforms.
At a guess (and it really is a guess!) an average PSD extended license is around $500 and for a WP or Magento etc its closer to 2K, if you assume a few hundred sales of each then you will recoup that easily so I would suggest the 1500 + bracket probably a bit more.
It all comes down to you and the original author but this is probably exactly why most agreements involve partnering on files. Good luck